A worker takes a random sample of 200 bolts and finds that 30 of them are either too long or Too Short thus making them unusable. Estimate the number of unusable bolts and a production of 17,000 bolts.


A. 1,610 Bolts

B. 2,550 Bolts

C. 2,140 Bolts

D. 2,260 Bolts


I got D. I just need to be sure it is the right answer.

Answers

Answer 1

Answer:

B

Step-by-step explanation:

30 are unusable in 200. So how many are unusable in 17,000??

We can set up a ratio and figure out the answer right away! Let x be the number of unusable bolts in 17,000, so we can write:

[tex]\frac{30}{200}=\frac{x}{17,000}\\200x=30*17000\\200x=510,000\\x=\frac{510,000}{200}\\x=2550[/tex]

THus, number of unusable bolts is 2550. B is right.


Related Questions

The owner of a chain of dance studios releases a report to the media. The report shows that participation in dance classes has increased by 5% in each of the past three years.

Which statement describes the most likely reason the owner releases the report?

Answers

The owner wants people to believe that dance classes are popular so that they sign up for classes. Therefore, option C is the correct answer.

What is the probability?

Probability can be defined as the ratio of the number of favourable outcomes to the total number of outcomes of an event.

The most likely reason the owner of the dance studio chain releases the report is to demonstrate the success of their business. By highlighting the fact that participation in dance classes has increased by 5% in each of the past three years, the owner is showing the public that the business is doing well and that they are providing a valuable service. This report may also be used to encourage potential customers to join the studio's classes, which would further increase their profits.

Therefore, option C is the correct answer.

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A set of telephone poles is stacked in a pile, 8 layers high. The top layer consists of 20 telephone
poles. The next layer down consists of 24 telephone poles. The third layer consists of 28
telephone poles. If this pattern continues for the remaining 5 layers, how many telephone poles
are in the pile?
A. 224
B. 244
C. 252
D. 272

Answers

Answer:

D. 272 poles

Explanation:

We are given that:

The top layer has 20 poles, the next down one has 24 poles and the third one has 28 poles

We can note that each layer has 4 poles more that the one above it

Based on this, we can get the number of poles in each layer as follows:

Top layer has 20 poles

Second one has 20 + 4 = 24 poles

Third one has 24 + 4 = 28 poles

Fourth one has 28 + 4 = 32 poles

Fifth one has 32 + 4 = 36 poles

Sixth one has 36 + 4 = 40 poles

Seventh one has 40 + 4 = 44 poles

Eighth one has 44 + 4 = 48 poles

Now, we can get the total number of poles by adding the poles in all layers

This is done as follows:

Total number of poles = 20 + 24 + 28 + 32 + 36 + 40 + 44 + 48

Total number of poles = 272 poles

Hope this helps :)

A 180-watt iHome® is used on an average of three hours a day. Find the cost of listening to the iHome for one week at a cost of $0.13 per kilowatt-hour.


A. $0.49

B. $11.34

C. $491.40

D. $0.07

Answers

Hello!

The answer is:

The correct option is:

A. $0.49

Why?

From the statement, we know that the iHome is used on average three hours a day, and we are asked to find the cost for a week, so first, we need to calculate the total hours that the iHome is used for, and then, calculate the kilowatt-hour consumption rate.

[tex]TotalTime_{week}=3\frac{hours}{day} *7days=21hours[/tex]

[tex]TotalEnergyConsumption_{week}=180watt*21hours=3780watt.hour[/tex]

Now, we must remember that:

[tex]1Kilowatt=1000watts[/tex]

So,

[tex]3780watts=3780watts.hour*\frac{1KiloWatt}{1000watts}=3.78KiloWatt.hour[/tex]

Then, calculating the cost, we have:

[tex]TotalCost_{week}=0.13\frac{dollar}{killowat.hour}*3.78killowat.hour=0.49(dollar)[/tex]

Hence, we have that the correct option is:

A. $0.49

Have a nice day!

In a fruit cocktail, for every 25 ml of orange juice you need 30 ml of apple juice and 45 ml of coconut milk. What proportion of the cocktail is coconut milk? Give your answer as a fraction in its simplest form.

Answers

Answer:

9 / 20

Step-by-step explanation:

We can form a ratio with the information "for every 25 ml of orange juice you need 30 ml of apple juice and 45 ml of coconut milk"

25 : 30 : 45

Total = 100

Coconut milk = 45 ml

45 / 100 = 9 / 20

A dog chases a squirrel. The dog is originally 200 feet away from the squirrel. The dog's speed is 150 feet per minute. The squirrel's speed is 100 feet per minute. How long will it take for the dog to get the squirrel?

Answers

Answer:

15 seconds

Step-by-step explanation:

If you make a table of values for the dog and the squirrel using d = rt, then the rates are easy:  the dog's rate is 150 and the squirrel's is 100.  The t is what we are looking for, so that's our unknown, and the distance is a bit tricky, but let's look at what we know:  the dog is 200 feet behind the squirrel, so when the dog catches up to the squirrel, he has run some distance d plus the 200 feet to catch up.  Since we don't know what d is, we will just call it d!  Now it seems as though we have 2 unknowns which is a problem.  However, if we solve both equations (the one for the dog and the one for the squirrel) for t, we can set them equal to each other.  Here's the dog's equation:

d = rt

d+200 = 150t

And the squirrel's:

d = 100t

If we solve both for t and set them equal to each other we have:

[tex]\frac{150}{d+200} =\frac{100}{d}[/tex]

Now we can cross multiply to solve for d:

150d = 100d + 20,000 and

50d = 20,000

d = 400

But we're not looking for the distance the squirrel traveled before the dog caught it, we are looking for how long it took.  So sub that d value back into one of the equations we have solved for t and do the math:

[tex]t=\frac{100}{d}=\frac{100}{400} =\frac{1}{4}[/tex]

That's 1/4 of a minute which is 15 seconds.

Answer:

4 mins

Step-by-step explanation:

Let x = the distance the squirrel runs before it's caught,

then the dog runs 200 + x.

 

distance/rate = time

 

x/100 = (200+x)/150 =>x/2 = (200+x)/3 => 400 +2x = 3x => x = 400

 

The squirrel runs 400' in 4 minutes.

What does a supplementary angle look like

Answers

Answer:

It has no special appearance.

Step-by-step explanation:

Any angle of measure 180° or less is supplementary to some angle. A supplementary angle is one that is the difference between 180° and the angle you have. That is, two supplementary angles total 180°.

__

Supplementary angles are readily identifiable in a number of geometries. Adjacent angles of a parallelogram are supplementary; linear angles are supplementary. Same-side interior angles where a transversal crosses parallel lines are supplementary.

A number cube with the numbers 1 through 6 is rolled 50 times and shows the number two 7 times. Calculate the experimental probability of the number cube showing the number two. P(2) =

Answers

Answer:

7/50

Step-by-step explanation:

Experimental and theoretical probability are much different.

With experimental, just read the experiment: the number two was rolled 7 times.

Put that over 50.

Avoid questions with theoretical probability, that's where math comes in.

Final answer:

The experimental probability of rolling a two on a number cube that was rolled 50 times and showed the number two 7 times is 0.14 or 14%.

Explanation:

To calculate the experimental probability of the number cube showing the number two, we divide the number of times two appears by the total number of rolls. In this case, the number cube was rolled 50 times and the number two appeared 7 times. Therefore, the experimental probability, denoted as P(2), is calculated as:

P(2) = Number of times two appears / Total number of rolls

P(2) = 7 / 50

P(2) = 0.14

So, the experimental probability of rolling a two on this number cube, based on the given data, is 0.14 or 14%.

The manager of a frozen yogurt shop wants to add some new flavors that will appeal to customers. Which surveying method is most likely to produce a representative sample of the yogurt shop's customers?

Answers

Final answer:

The surveying method that is most likely to produce a representative sample of the yogurt shop's customers is true random sampling.

Explanation:

The surveying method that is most likely to produce a representative sample of the yogurt shop's customers is the true random sampling method. This method involves randomly selecting participants from the entire population of yogurt shop customers, ensuring that each customer has an equal chance of being selected. This helps to minimize bias and ensure that the sample is representative of the entire customer population.

For example, the manager can generate a list of all the customers who have made purchases at the yogurt shop over a specific period of time, and then use a random number generator or a random selection method to choose a certain number of customers from the list. This will ensure that the selected participants represent the diversity of the yogurt shop's customer base.

The most appropriate surveying method for the yogurt shop manager to obtain a representative sample of customers is systematic sampling.

To obtain a representative sample of the yogurt shop's customers, the most appropriate surveying method would be a systematic sampling approach. This involves selecting every nth customer who visits the shop during different times of the day and different days of the week.

By using a systematic sampling method, the manager can ensure that the sample includes customers from various demographic groups, such as different age ranges, genders, and visiting patterns. This approach reduces the potential for bias that may arise from convenience sampling methods, where only customers who are readily available or willing to participate are surveyed.

Additionally, the systematic sampling method allows the manager to capture the preferences of both regular and occasional customers, as well as those who visit during peak and off-peak hours. This comprehensive representation of the customer base increases the likelihood that the survey results will accurately reflect the preferences of the yogurt shop's overall customer population.

Systematic sampling is more time-consuming and resource-intensive than convenience sampling, but it is a more reliable method for obtaining a representative sample of the yogurt shop's customers, which is crucial for making informed decisions about introducing new flavors that will appeal to a wide range of customers.

In a certain region, the equation  y=19.485x+86.912  models the amount of a homeowner’s water bill, in dollars, where x is the number of residents in the home.


What does the slope of the equation represent in context of the situation?

1. The water bill increases by about $19 every month.

2. The water bill increases by about $19 for every additional resident in the home.

3. The water bill increases by about $87 every month.

4. The water bill increases by about $87 for every additional resident in the home.

Answers

Answer:

It's choice 2.

Step-by-step explanation:

y=19.485x+86.912

The 19.485 is the slope of the graph of this equation.  This gives the rate of change of the amount of the bill (above $86.912)  for  each added resident (x).

What is the distance between the points (5, 1) and (-3, -5)?

2 √5
2 √10
10
4 √5

Answers

the answer is 10. just use the distance formula which is the square root of (x2-x1)^2+(y2-y1)^2

Answer: 10 units

Step-by-step explanation:

The distance  from point (a,b) and (c,d) is given by formula below:-

[tex]D=\sqrt{(c-a)^2+(d-b)^2}[/tex]

Therefore, the distance between the points (5, 1) and (-3, -5) will be :

[tex]D=\sqrt{(-3-5)^2+(-5-1)^2}\\\\\Rightarrow\ D=\sqrt{(-8)^2+(-6)^2}\\\\\Rightarrow\ D=\sqrt{64+36}\\\\\Rightarrow\ D\sqrt{100}\\\\\Rightarrow\ D=10\text{ units}[/tex]

Hence, the distance between the points (5, 1) and (-3, -5) = 10 units

Help with Algebra! (Photo attached)

Answers

Answer:

  D.  The graph of g(x) is shifted 2 units up.

Step-by-step explanation:

Adding 2 to the y-coordinate of a point shifts it up by 2 units.

___

The graph of f(x) is all points (x, f(x)). When you add 2 to f(x), you make the graph of g(x) be all points (x, g(x)) = (x, f(x)+2). That is all of the points on the original graph are shifted up by 2 units.

Sometimes you to ___ some points to get a good approximation of the location of extreme values

Answers

Answer:

Sometimes you to plot some points to get a good approximation of the location of extreme values.

Final answer:

Approximating some points, especially influential points or outliers, helps to get a better grasp of the location of the extreme values. This is crucial in fields like calculus, statistics and graphing, and it assists in identifying patterns and trends. Additionally, substitution of 'x' values in an equation can help estimate 'y' values.

Explanation:

Sometimes in mathematics, particularly in fields such as calculus, statistics, and graph theory, you need to approximate some points for a good understanding of the location of extreme values. This practice is especially useful when identifying influential points or outliers within a data set, as these points significantly alter the slope or fitness of a regression line. When you find such points, you can exclude them from your calculations to get a more accurate overview of the general pattern or trend.

In the case of graphing, selection of an appropriate scale for both axes is also crucial. The scale should reflect all your data while also making it easy to identify any trends within it. Too large a scale can make data changes hard to see, while a too fine scale necessitates more space for the graph and can crowd information.

Additionally, in calculus and algebra, to estimate the 'y' values for various 'x-values', one can substitute the 'x' values into the equation. This helps to offer a clearer insight into the correlation of variables within a function.

Learn more about Approximation of Points here:

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HARDEST MATH QUESTION OF ALL TIME, CAN YOU SOLVE????????????????????? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sorry for the click baity title, I just really need to figure this out.

m AB = 110
m DE = 130

What is m
60
70
110
120

Answers

Answer:

60

Step-by-step explanation:

Angles AKB and EKD are vertical angles and congruent.

The measure of angle AKB is the sum of the measures of arcs AB and ED divided by 2.

m<AKB = (110 + 130)/2 = 120

Angles AKB and AKE are supplementary angles, so their measures add to 180 deg.

m<AKE + m<AKB = 180

m<AKE + 120 = 180

m<AKE = 60

the measurements of a box are doubled. what happens to its surface area?

Answers

Answer:

Surface area increases by a factor of 4

Step-by-step explanation:

Given the linear ratio = a : b, then

the area ratio = a² : b²

Here the linear ratio = 1 : 2, hence

area ratio = 1² : 2² = 1 : 4 ← increase by factor of 4

The function below shows the number of car owners f(t), in thousands, in a city in different years t:f(t) = 1.1t2 − 2.5t + 1.5The average rate of change of f(t) from t = 3 to t = 5 is ______ thousand owners per year.Answer for Blank 1:

Answers

Answer:

The average rate of change is : [tex]6.3[/tex]

Step-by-step explanation:

The number of car owners is modeled by the function;

[tex]f(t)=1.1t^2-2.5t+1.5[/tex], where t is the different number of years.

The average rate of change  of f(t)  from t=3 to t=5 is simply the slope of the secant line connecting:

(3, f(3)) and (5,f(5))

Which is given by:

[tex]\frac{f(5)-f(3)}{5-3}[/tex]

Now, we substitute t=3 into the function to get;

[tex]f(3)=1.1(3)^2-2.5(3)+1.5[/tex]

[tex]f(3)=3.9[/tex]

We substitute t=5 into the function to get;

[tex]f(5)=1.1(5)^2-2.5(5)+1.5[/tex]

[tex]f(5)=16.5[/tex]

Therefore the average rate of change is : [tex]\frac{14.5-3.9}{2}=6.3[/tex]

The table shows the estimated number of deer living in a forest over a five-year period. Are the data best represented by a linear, exponential, or quadratic model? Write an equation to model the data.

0/89 1/55 2/34 3/21 4/13


a. quadratic; y = 0.62x2 + 89

b. exponential; y = 89 • 0.62x

c. linear; y = 0.62x + 89

d. quadratic; y = 89x2 + 0.62

Answers

Answer:

 

exponential; y = 89 • 0.62^x

Step-by-step explanation:

Answer:

Option B exponential y = 89 · 0.62x

Step-by-step explanation:

The table shows the estimated number of deer living in a forest over a five year period.

Year            Number of deers

0                     89

1                      55

2                     34

3                     21

4                     13

Now we have to find the model representing this situation. Difference in number of deer, in the forest.

We can see there is a common ratio between each successive term r = [tex]\frac{55}{89}[/tex] = 0.618

r = [tex]\frac{34}{55}[/tex] = 0.618

so it can be represented by an exponential model.

[tex]y=a (r) ^{x}[/tex]

[tex]y=89(62) ^{x}[/tex]

Option B is the answer.

a chef plans to mix 100% vinegar with italian dressing. the italian dressing contains 7% vinegar. the chef wants to make 310 milliliters of a mixture that contains 19% vinegar. how much vinegar and how much italian dreessing should she use ?
vinegar: ? milliliters
italian dressing: ? milliliters

Answers

Let [tex]x[/tex] be the amount (mL) of the pure vinegar the chef will use, and [tex]y[/tex] the amount of dressing. She wants to end up with a 310 mL mixture, so

[tex]x+y=310[/tex]

For each mL used of the dressing, 0.07 mL is vinegar, and the chef wants to end up with a 19% vinegar mixture, so

[tex]x+0.07y=0.19(x+y)=58.9[/tex]

Now

[tex]x+y=310\implies y=310-x[/tex]

[tex]\implies x+0.07(310-x)=58.9[/tex]

[tex]\implies0.93x+21.7=58.9[/tex]

[tex]\implies0.93x=37.2[/tex]

[tex]\implies x=40[/tex]

[tex]\implies y=270[/tex]

Tickets cost $4.75 for adults and $2.50 for children What is the total cost of the tickets for two adults and three children

Answers

Answer:

$9.50 - for adults

$7.50 - children

Step-by-step explanation:

All you have to do is multiply $4.75 by 2 since there are two adults and multiply $2.50 by 3 since there  are three children.

One jar of jelly costs $2.32 for 16 ounces. Another jar costs $2.03 for 13 ounces. Which is the better buy? Why? The jelly that costs $____ for ____ ounces is the better buy. The unit rate for this jar of jelly is $____, or approximately $____ per ounce. The unit rate for the second jar of jelly is $____, or approximately $____ per ounce. Question 4 options: Blank # 1 Blank # 2 Blank # 3 Blank # 4 Blank # 5 Blank # 6

Answers

Answer:

The jar of jelly that costs $2.32 for 16 ounces is the better buy, because the unit rate is less

Step-by-step explanation:

step 1

Find the units rate

One jar of jelly costs $2.32 for 16 ounces

so

The unit rate is equal to [tex]\frac{2.32}{16}= 0.145\frac{\$}{ounce}[/tex]

Another jar costs $2.03 for 13 ounces

so

The unit rate is equal to [tex]\frac{2.03}{13}= 0.156\frac{\$}{ounce}[/tex]

step 2

Compare the unit rates

[tex]0.145\frac{\$}{ounce} < 0.156\frac{\$}{ounce}[/tex]

therefore

The jar of jelly that costs $2.32 for 16 ounces is the better buy, because the unit rate is less

The jelly that costs $2.32 for 16 ounces is the better buy. The unit rate for this jar of jelly is $0.145 or approximately $0.15 per ounce. The unit rate for the second jar of jelly is $0.156 or approximately $0.16 per ounce

please help, thank you

Answers

Answer:

[tex]\displaystyle x=\frac{-8\pm\sqrt{(8)^2-4(4)(-221)}}{2(4)}\ \text{; x = 6.5 and x = -8.5}[/tex]

Step-by-step explanation:

Subtract the right side of the given equation to put it into standard form:

  4x² +8x -221 = 0

Then the coefficients used in the quadratic formula are ...

a = 4b = 8c = -221

When these are filled into the form ...

[tex]\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

the result is as shown above.

Match the one-to-one functions with their inverse functions.

Answers

I'll match them for you, but to find the inverse of an equation, all you must do is

Switch x and y Solve for y again for the "inverse" !

[tex]f(x)^{-1}  = 5x[/tex]  →  [tex]f(x) = \frac{x}{5}[/tex]

[tex]f(x)^{-1} = \frac{x^{3}}{2}[/tex]  →  [tex]f(x) = \sqrt[3]{2x}[/tex]

[tex]f(x)^{-1} = x + 10[/tex]  →  [tex]f(x) = x - 10[/tex]

[tex]f(x)^{-1} = \frac{3(x+17)}{2}[/tex]  →  [tex]f(x) = \frac{2x}{3} -17[/tex]

Hope I help ! :)

ANSWER

[tex] \boxed {f(x)= \frac{2x}{3} - 17\to \: f ^{ - 1} (x)=\frac{3x + 51}{2}}[/tex]

[tex] \boxed {f(x) = x - 10 \to {f}^{ - 1} (x) = x + 10 }[/tex]

[tex] \boxed {f(x) = \sqrt[3]{2x} \to {f}^{ - 1} (x) = \frac{ {x}^{3} }{2} }[/tex]

[tex] \boxed {f(x) = \frac{x}{5} \to{f}^{ - 1} (x) = 5x}[/tex]

EXPLANATION

1.

Given :

[tex]f(x) = \frac{2x}{3} - 17[/tex]

Let

[tex]y =\frac{2x}{3} - 17[/tex]

Interchange x and y.

[tex]x=\frac{2y}{3} - 17[/tex]

Solve for y.

[tex]x + 17=\frac{2y}{3} [/tex]

[tex]3x + 51=2y[/tex]

[tex]y=\frac{3x + 51}{2} [/tex]

[tex]f ^{ - 1} (x)=\frac{3x + 51}{2} [/tex]

2.

Given: f(x)=x-10

Let y=x-10

Interchange x and y.

x=y-10

Solve for y.

y=x+10

This implies that,

[tex] {f}^{ - 1} (x) = x + 10[/tex]

3.

Given:

[tex]f(x) = \sqrt[3]{2x} [/tex]

Let

[tex]y=\sqrt[3]{2x} [/tex]

Interchange x and y.

[tex]x=\sqrt[3]{2y} [/tex]

solve for y.

[tex] {x}^{3} = 2y[/tex]

[tex]y = \frac{ {x}^{3} }{2} [/tex]

[tex] {f}^{ - 1} (x) = \frac{ {x}^{3} }{2} [/tex]

4.

Given:

[tex]f(x) = \frac{x}{5} [/tex]

Let

[tex]y = \frac{x}{5} [/tex]

Interchange x and y.

[tex]x = \frac{y}{5} [/tex]

Solve for y.

[tex]y = 5x[/tex]

[tex] {f}^{ - 1} (x) = 5x[/tex]

What are the answers to these? List them by order from top to bottom please, also the top question is that they want the design that will use less cardboard to make, which box is it? ❤️❤️❤️

Answers

Answer:

proposed design uses less cardboard, also has less volume. I don't dig it.BOXer B has the greatest surface areaBOXer D has the greatest surface area

Step-by-step explanation:

When there are many instances of the same calculation, it is convenient to let a spreadsheet or graphing calculator do them. The formula can be entered once and used many times. See the attachment for an example.

1. The surface area of a box with dimensions L, W, D can be written as ...

  S = 2(LW +LD +WD) = 2(LW +D(L+W))

Then the surface area of the left (original) box is ...

  S = 2(2·12 + 8(2+12)) = 2(24 +112) = 272 . . . . square inches

The surface area of the right (proposed) box is ...

  S = 2(4·3 +14(4+3)) = 2(12 +98) = 220 . . . . square inches

The volume of the original box, at 2·12·8 = 192 in³ is greater than the volume of the proposed box (3·4·14 = 168 in³), so the customer gets less cereal with the redesigned box. I don't dig it.

__

2. The previous question shows the formula and an example of the calculation. The attachment shows the numbers for this question.

box A: 62 ft²box B: 70 ft² — winner

__

3. The attachment shows the numbers for this question.

box C: 270 m²box D: 272 m² — winner

Solve the following equation for y.
2y + 2 = 36

Answers

Solving step by step:

2y + 2 = 36

Move the constant to the right and change the sign.

2y = 36 - 2

Calculate the right side.

2y = 34

Divide both sides by 2.

y = 17

Answer:

y = 3 • ± √2 = ± 4.2426

Step-by-step explanation:

2y2 -  36  = 0  

Step  2  :

Step  3  :

Pulling out like terms :

3.1     Pull out like factors :

  2y2 - 36  =   2 • (y2 - 18)  

Trying to factor as a Difference of Squares :

3.2      Factoring:  y2 - 18  

Theory : A difference of two perfect squares,  A2 - B2  can be factored into  (A+B) • (A-B)

Proof :  (A+B) • (A-B) =

        A2 - AB + BA - B2 =

        A2 - AB + AB - B2 =  

        A2 - B2

Note :  AB = BA is the commutative property of multiplication.  

Note :  - AB + AB equals zero and is therefore eliminated from the expression.

Check : 18 is not a square !!  

Ruling : Binomial can not be factored as the difference of two perfect squares.

Equation at the end of step  3  :

 2 • (y2 - 18)  = 0  

Step  4  :

Equations which are never true :

4.1      Solve :    2   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

4.2      Solve  :    y2-18 = 0  

Add  18  to both sides of the equation :  

                     y2 = 18  

 

When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:  

                     y  =  ± √ 18  

Can  √ 18 be simplified ?

Yes!   The prime factorization of  18   is

  2•3•3  

To be able to remove something from under the radical, there have to be  2  instances of it (because we are taking a square i.e. second root).

√ 18   =  √ 2•3•3   =

               ±  3 • √ 2  

The equation has two real solutions  

These solutions are  y = 3 • ± √2 = ± 4.2426

Solve the system. 0.2x + 0.5y = 4 -0.1x + 0.3y = -2 A) (20, 0) B) (-2, 5) C) (-5, 10) D) (50, 10)

Answers

Answer:

  A)  (20, 0)

Step-by-step explanation:

Double the second equation and add that to the first:

  (0.2x +0.5y) +2(-0.1x +0.3y) = (4) +2(-2)

  1.1y = 0

   y = 0

Substitute this value into either equation to find x.

  0.2x +0.5·0 = 4

  x = 4/0.2 = 20

The solution is (x, y) = (20, 0).

Bob has 35 liters of lemonade if he distributes all the lemonade equally into 7 juice pitchers, how much lemonade will be in each pitcher?

Answers

Answer:

5 liters

Step-by-step explanation:

Divide 35 liters evenly between the 7 pitchers and you'll have 5 liters in each pitcher.

Final answer:

To find the amount of lemonade in each pitcher, divide the total amount of lemonade by the number of pitchers. In this case, each pitcher will contain 5 liters of lemonade.

Explanation:

To find the amount of lemonade in each pitcher, we divide the total amount of lemonade by the number of pitchers. In this case, Bob has 35 liters of lemonade and 7 pitchers. So, to find the amount of lemonade in each pitcher, we divide 35 by 7.



35 ÷ 7 = 5 liters of lemonade



Therefore, there will be 5 liters of lemonade in each pitcher.

If Bob has 35 liters of lemonade and he distributes it equally into 7 juice pitchers, we need to perform a division to find out how much lemonade will be in each pitcher. The calculation is straightforward:

Divide the total volume of lemonade by the number of pitchers.

35 liters ÷ 7 pitchers = 5 liters per pitcher.

Therefore, each juice pitcher will contain 5 liters of lemonade.

URGENT!!! TIMED!!!!
Kievan bought a new eraser that came in a cardboard wrapper.

What is the minimum amount of cardboard used for the wrapper?
38cm^2
40cm^2
76cm^2
80cm^2

IT'S NOT 40

Answers

Answer: Third option.

Step-by-step explanation:

You need to find the surface area with the formula for calculate the surface area of a rectangular prism:

[tex]SA=2(wl + lh + hw)[/tex]

Where w is the width, l is the length, and h is the height.

You can observe in the figure that:

[tex]l=5cm\\w=4cm\\h=2cm[/tex]

Then, substituting the values into the formula  [tex]SA=2(wl + lh + hw)[/tex], you get that  minimum amount of cardboard used for the wrapper is:

[tex]SA=2[(4cm)(5cm)+(5cm)(2cm)+(2cm)(4cm)]\\SA=76cm^2[/tex]

Answer:

third option

Step-by-step explanation:

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.

Match each sequence to its appropriate recursively defined function.

f(1) = -18

f(n) = 6 · f(n - 1) for n = 2, 3, 4, ...

f(1) = -18

f(n) = f(n - 1) + 21 for n = 2, 3, 4, ...

f(1) = 11

f(n) = f(n - 1) + 22 for n = 2, 3, 4, ...

f(1) = 11

f(n) = 3 · f(n - 1) for n = 2, 3, 4, ...

f(1) = -18

f(n) = f(n - 1) + 22 for n = 2, 3, 4, ...

f(1) = -18

f(n) = 2 · f(n - 1) for n = 2, 3, 4, ...

Sequence

Recursively Defined Function

11, 33, 55, 77, ...

arrowBoth

-18, -108, -648, -3,888, ...

arrowBoth

-18, 3, 24, 45, ...

arrowBoth

Answers

Answer:

  see below

Step-by-step explanation:

Since there are fewer sequences than functions, we'll identify the matchup according to the sequence.

11, 33, 55, 77, ...

The first term is 11. The terms have a common difference of 33 -11 = 22. That is, each term is 22 more than the previous one. The appropriate recursive function is ...

f(1) = 11f(n) = f(n-1) +22 for n > 1

__

-18, -108, -648, -3888, ...

The first term is -18. The terms obviously do not have a common difference, but their common ratio is -648/-108 = -108/-18 = 6. That is, each term is 6 times the previous one. Then the appropriate recursive function is ...

f(1) = -18f(n) = 6·f(n-1) for n > 1

__

-18, 3, 24, 45, ...

The first term is -18. The terms have a common difference of 3-(-18) = 21. That is, each term is 21 more than the previous one. The appropriate recursive function is ...

f(1) = -18f(n) = f(n-1) +21 for n > 1

Answer:

11, 33, 55, 77, ...=f(n) = f(n - 1) + 22 for n = 2, 3, 4, ...

-18, -108, -648, -3,888, ...=f(n) = 6 · f(n - 1) for n = 2, 3, 4, ...

-18, 3, 24, 45, ...=f(n) = f(n - 1) + 21 for n = 2, 3, 4, ...

Step-by-step explanation:

Seth and Eva are biking on a trail. Seth begins 8 miles ahead of Eva and bikes at an average speed of 4 miles per hour. Eva bikes at an average speed of 6 miles per hour. How much time will it take for Eva to catch up with Seth on the trail?

Answers

Answer:

4 hours

Step-by-step explanation:

0:8

6:12

12:16

18:20

24:24

Answer: 4 hours

Step-by-step explanation:

"No solutions & all real numbers"


Solve each equation showing all work:

1.) -2(6 - 2x) = 4(-3 + x)

2.) 5 - 1(2x + 3) = -2(4 + x)

Answers

Answer:

1.)[tex]-12+4x=-12+4x[/tex]

2.) [tex]2-2x \neq -8-2x[/tex]

Step-by-step explanation:

The distributive property states that multiplying a sum by a number gives the same result as multiplying each addend by the number and then adding all the products.

[tex]a(b+c)=ab+ac[/tex]

For the first equation

[tex]-2(6-2x)=4(-3+x)\\(-2)(6)+(-2)(-2x)=(4)(-3)+(4)(x)\\-12+4x=-12+4x[/tex]

For the second equation

[tex]5-1(2x+3)=-2(4+x)\\5+((-1)(2x)+(-1)(3))= (-2)(4)+(-2)(x)\\5+(-2x-3) = -8+(-2x)\\5-2x-3=-8-2x\\2-2x \neq -8-2x[/tex]

.

Line l is parallel to line m. The slope of? line l is 8/5 . What is the slope of line m?

Answers

Answer:

8/5

Step-by-step explanation:

The slope of two parallel lines is always the same, just are in different locations on the x or y axis.

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