Bodhi has a collection of 175 dimes and nickels. The collection is worth $13.30. Which equation can be used to find n, the number of nickels in the collection? 0.1n + 0.05(n – 175) = 13.30 0.1n + 0.05(175 – n) = 13.30 0.1(n – 175) + 0.05 = 13.30 0.1(175 – n) + 0.05n = 13.30

Answer:

option A

Step-by-step explanation:

Step 1

X

[tex]x=\left[\begin{array}{ccc}b&a\\4&a\end{array}\right][/tex]

Step 2

2Y

[tex]\left[\begin{array}{ccc}2c&2d\\2a&2b\end{array}\right][/tex]

Step 3

X - 2Y = Z

[tex]2Y=\left[\begin{array}{ccc}b&a\\4&a\end{array}\right]-\left[\begin{array}{ccc}2c&2d\\2a&2b\end{array}\right]=\left[\begin{array}{ccc}a&c\\16&b\end{array}\right][/tex]

Step 4

Four equations are formed

Equation 1

b - 2c = a

Equation 2

a - 2d = c

Equation 3

4 - 2a = 16

-2a = 16 - 4

-2a = 12

Equation 4

a -2b = b

-6 - 2b = b

-6 = b + 2b

-6 = 3b

Plug values of a and b in equation 1 and 2

b - 2c = a

-2 -2c = -6

-2c = -6 + 2

-2c = -4

c = -4/-2

a - 2d = c

-6 -2d = 2

-2d = 2+6

-2d = 8

 d = 8/-2

Answer:

63.2702623...

Step-by-step explanation:

The ratio between FE and DE is the tangent of the angle EDF.[tex]tan 49 = \frac x {55}[/tex] or [tex]x= 55*tan 49[/tex]. With a calculator, you get 63.2702623... Cut where needed

55x tan49 =63.270

63.270.

Given the speeds of the dog and cat, the dog will catch the cat in approximately 33.33 seconds by covering the 200-meter distance at a relative speed of 6 m/s.

Problem: A dog and a cat are 200 meters apart. The dog runs at 30 m/s, and the cat runs at 24 m/s. How soon will the dog catch the cat?

Calculate the relative speed at which the dog is gaining on the cat: 30 m/s - 24 m/s = 6 m/s.

Divide the initial distance (200 meters) by the relative speed (6 m/s) to find the time it takes for the dog to catch the cat: 200 m / 6 m/s = 33.33 seconds.

To find out the total time Mrs. Winter's students spent reading, add up all the fractional hour amounts on the line plot for each student.

In this question, we are dealing with the issue of determining the total time that Mrs. Winter's students spent on reading, using a line plot that displays fractional hours. Unfortunately, without the actual line plot, we can't provide a specific numerical answer. However, the process would involve adding up all the fractional hour amounts for each student. For instance, if one student read for 1/2 hour and another for 1/3 hour, the total would be 1/2 + 1/3 = 5/6 hour. Repeat this addition process for all the students in the class to find the overall total time spent reading.

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The total time which Mrs. Winter's students spend reading last night is: A. 10 3/4 hours.

In Mathematics and Statistics, a line plot is a type of graph that is used for the graphical representation of data set above a number line, while using crosses, dots, or any other mathematical symbol.

Based on the information provided about the fraction of an hour, a frequency table can be computed as follows;

Hour    Frequency

1/4                 10

1/2                  9

3/4                 5

In this context, we can calculate the total amount of time as follows;

Total amount of time = 1/4(10) + 1/2(9) + 3/4(5)

Total amount of time = 10/4 + 9/2 + 15/4

Total amount of time = 10 3/4 hours.

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Answer:

Step-by-step explanation:

Answer:

500

Step-by-step explanation:

The experimental probability of breakage is 5 out of 100, or 0.05.

Thus, if the shipment of bulbs numbers 10,000, the expected number of broken bulbs is 0.05(10,000), or 500.

Answer:

Correct answer is choice B.

Step-by-step explanation:

We have been given a graph and 4 different choices.

Now we need to determine about which of the given functions best fits the points in the graph.

From graph we can clearly see that points are going upward very fast as compared to x when x-value increases.

That happens in exponential type function  which is usually written in form of

[tex]y=ab^x[/tex]

Choice B looks similar to that.

hence correct answer is choice B.

Answer:

Step-by-step explanation:

This is a right triangle problem.  The reference angle is x, the side opposite the reference angle is 32, and the hypotenuse is 58.  The trig ratio that relates the side opposite a reference angle to the hypotenuse is the sin.  Filling in accordingly:

[tex]sin(x)=\frac{32}{58}[/tex]

Because you are looking for a missing angle, you will use your 2nd button and then the sin button to see on your display:

[tex]sin^{-1}([/tex]

Within the parenthesis enter the 32/58 and you'll get your angle measure.  Make sure your calculator is in degree mode, not radian mode!!!

Answer:

x = 8

Step-by-step explanation:

Since the triangle is right use Pythagoras' theorem to solve for x

The square on the hypotenuse of a right triangle is equal to the sum of the squares on the other 2 sides, thus

x² + 15² = 17²

x² + 225 = 289 ( subtract 225 from both sides )

x² = 64 ( take the square root of both sides )

x = [tex]\sqrt{64}[/tex] = 8

Answer:

B

Step-by-step explanation:

The surface area of this solid is the sum of all the surfaces.

There are 4 rectangular surfaces all around, each measuring 4 by 5 m.

So area of 4 of these surfaces is: 4 * (4*5)= 4 * 20 = 80

The bottom is a rectangle with dimensions 4 and 4. So area is 4 * 4 = 16

There are 4 triangular faces in the top portion, each with base 4 and height 3. Area of triangle is 1/2 * base * height. Hence,

Area of 4 of these triangles is 4*[(1/2)*4*3] = 4 * 6 = 24

Thus, the surface area = 80 + 16 + 24 = 120 m^2

Answer choice B is right.

Answer:

604

Step-by-step explanation:

"Top 15%" corresponds to the rightmost area under the standard normal curve to the right of the mean.  That means 85% of the area under this curve will be to the left.  Which z-score corresponds to the area 0.85 to the left?

Using a calculator (invNorm), find this z-score:  invNorm(0.85) = 1.0346.

Which raw score corresponds to this z-score?

Recall the formula for the z-score:

       x - mean

z = ------------------

         std. dev.

Here we have:

       x - 500

z = ------------------ - 1.0364, or x - 500 = 103.64.  Then the minimum score

          100                necessary to be in the top 15% of the scores is

                                  found by adding 500 to both sides:

                                   x = 603.64

Minimum score necessary to be in the top 15% of the SAT scores is 604.

The middle 80% of the distribution ranges from 372 to 628.

The SAT scores form a normal distribution with a mean (")") of 500 and a standard deviation (")") of 100. We need to find:

1. Minimum Score to be in the Top 15%

X = μ + zσ

Calculating the SAT Score:

So, X = 500 + 1.04 * 100 = 604. Therefore, the minimum score necessary to be in the top 15% is 604.

2. Range of Values for the Middle 80%

From a z-score table, the z-scores are approximately -1.28 and +1.28.

X_low = μ + (-1.28)σ  and X_high = μ + 1.28σ

Calculating the Range:

So, the range of scores that define the middle 80% is 372 to 628.

You can analyze it in this way:

1)(2) in y2-2y can show that was (y-1)^2 so we add -1 to -8 => -9

2)(8) in x2-8x show us that was (x-4)^2 so we add -16 to -9 => -25

and finally we have:(x-4)^2 + (y-1)^2 =25

it means C is true!

Answer:(x−4)2+(y−1)2=25 is the answer

Answer:

Each sweater costs $35.

Step-by-step explanation:

First subtract the total price ($160) by the price of the shirt ($20).

160 - 20 = 140

Now were left with $140. Since Katie bought 4 sweaters, divide 140 by 4.

140/4 = 35

This means that each sweater was $35. If you want to make sure this is correct just multiply 35 by 4 and then add the $20. You should end up with $160.

35 x 4 = 140

140 + 20 = 160

Answer:

a) The minimum y-value of f(x) is -3

d) The minimum y-value of g(x) is -3

Step-by-step explanation:

Given in the question that,

f(x) = 3[tex]^{x}[/tex]-3

g(x) = 7x² - 3

At large negative exponents, the value approaches to zero

y = [tex]3^{-100}-3=-3[/tex]

y = [tex]3^{-1000}-3=-3[/tex]

y = [tex]3^{-10000}-3=-3[/tex]

Minimum y-value of g(x) will be when x = 0

y = 7x² - 3

y = 7(0) - 3

y = -3

Answer :B and D

explanation: that’s correct

Answer:

One solution:  y = -1

Step-by-step explanation:

Perform the indicated multiplications:

5y + 5 - y = 3y - 3 + 7, or

4y + 5 = 3y + 4, or

y = -1    This equation has ONE solution:  y = -1

The statement that best describes the domain and range of p(x) and q(x) is:

             p(x) and q(x) have the same domain and the same range.

We are given a function p(x) as:

[tex]p(x)=6-x[/tex]

AS the function is a polynomial function.

Hence it is defined everywhere for all the real values.

Hence, the domain of the function p(x) is: All  Real numbers.

and the range of the function p(x) is: All the real numbers.

and the function q(x) is given by:

[tex]q(x)=6x[/tex]

which is also a polynomial function.

Hence, it also has the same domain and range.

Domain and range are specific sets for each function. For given case, p(x) and q(x) have the same domain and range.

Domain is the set of values for which the given function is defined.

Range is the set of all values which the given function can output.

The domain and range of given functions are:

For any real number value of x, p(x) just takes 6-x(negates the input and add 6 to it), thus, its always defined, and thus, its domain is all real numbers.

Since p = 6-x is possible to go negatively infinite and positively infinite and always continuous, thus, its range is all real numbers(all numbers are possible as its output)

We can prove the above statement. Let some real number T is not in the range of p(x). But we have T = 6-x => x = 6-T which is a real number, thus, for input 6-T, there is output T. Thus, its a contradiction, and thus, all real numbers are in range of p(x).

Thus,

Its scaling all numbers. All numbers can be multiplied by 6 and produce a valid result. Thus, its domain is all real numbers.

Suppose that we've T as a real number. Then we can get this as output if we put input as x = T/6 (since then 6x = 6(T/6) = T)

Thus, all real numbers are in its output set, thus, its range is all real numbers.

The Range of q(x): [tex]x \in \mathbb R[/tex] and Domain of q(x): [tex]x \in \mathbb R[/tex]

Hence, for given case, p(x) and q(x) have the same domain and range.

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Answer:

50 mph, 450 mi, 73.3 ft/sec

Step-by-step explanation:

Part 1:

Find the unit rate (which here is mph).

 175 mi

------------- = 50 mph

3.5 hrs

Part 2:

In 8.5 hrs, the Andersons can expect to cover (50 mph)(8.5 hr) = 425 mi

Part 3:

50 mph       88 ft/sec

------------ *  ----------------- = 73.33 ft/sec, or 73.3 ft/sec to the nearest tenth.

      1              60 mph

Answer: Second Option

"the summation of 880 times one fourth to the i minus 1 power, from i equals 1 to infinity. ; the sum is 1,173"

Step-by-step explanation:

We know that infinite geometrical series have the following form:

[tex]\sum_{i=1}^{\infty}a_1(r)^{n-1}[/tex]

Where [tex]a_1[/tex] is the first term of the sequence and "r" is common ratio

In this case

[tex]a_1 = 880\\\\r=\frac{1}{4}[/tex]

So the series is:

[tex]\sum_{i=1}^{\infty}880(\frac{1}{4})^{n-1}[/tex]

By definition if we have a geometric series of the form

[tex]\sum_{i=1}^{\infty}a_1(r)^{n-1}[/tex]

Then the series converges to  [tex]\frac{a_1}{1-r}[/tex]   if [tex]0<|r|<1[/tex]

In this case [tex]r = \frac{1}{4}[/tex] and [tex]a_1=880[/tex]  then the series converges to [tex]\frac{880}{1-\frac{1}{4}} = 1,173.3[/tex]

Finally the answer is the second option

Answer:

a difference of two squares

Step-by-step explanation:

Note that 36 − 16 is a difference of two squares:  6^2 - 4^2.

Answer:

Step-by-step explanation:

Radius

= 28 ÷ 2

= 14 m

Volume

= 1/3 (3.14) (14)²(48)

= 1/3 (3.14) (196)(48)

= 9847.04 m³

Answer:  A. 9847.04 cubic meters

Step-by-step explanation:

From the given picture, we have

The diameter of the cone = 28 m

Then the radius of the cone = [tex]\dfrac{28}{2}=14\text{ m}[/tex]

Height of the cone = 48 inches

The volume of cone is given by :-

[tex]V=\dfrac{1}{3}\pi r^2h\\\\\Rightarrow V=\dfrac{1}{3}(3.14)(14)^2(48)\\\\\Rightarrow V=9847.04\text{ m}^3[/tex]

Hence, the volume of the cone = [tex]9847.04\text{ m}^3[/tex]

1. Volume is Length x width x height.

Volume = 6 x 4 x 8 = 192 ft^2

Answer is D.

2. Divide the volume by the height to get the area of the base.

Area of base = 312 / 12 = 26 in^2

Answer is D.

3. A 1/2 x 8 x 6 = 24 x 12 = 288 cm^3

   B.  (12 +6)/2 x 5 = 45 x 14 = 630 m^3

4. See attached picture.

Answer:

[tex]\frac{1}{6}[/tex]

Step-by-step explanation:

In probability theory, "AND" means multiplication and "OR" means "addition".

We can find the 2 probabilities separately and multiply them (as there is "AND")

So,

Probability number rolled greater than 4 = number of numbers that are greater than 4/total number of numbers

There are 2 numbers greater than 4 in a die (5 & 6) and total 6 numbers, so

P(number greater than 4) = 2/6

Now,

Probability that tails come up in coin toss = 1/2 (there are 1 tail and 1 head in a coin)

Hence,

P(number greater than 4 and tails in coin) = 2/6 * 1/2 = 1/6

To find the probability of rolling a number greater than 4 on a die and getting tails on a coin toss, you multiply the individual probabilities: (1/3) for the die roll and (1/2) for the coin toss, resulting in a combined probability of 1/6.

The question is asking to find the probability of a specific combined event involving the roll of a number cube (a six-sided die) and the flip of a coin. To solve this problem, we need to calculate the probability that the number cube shows a number greater than 4 (which can be either a 5 or 6) and that the coin toss results in tails.

First, we find the probability of rolling a number greater than 4 on a six-sided die. There are 2 favorable outcomes (5 or 6) out of 6 possible outcomes, so the probability of this event is 2/6, which simplifies to 1/3.

Next, we calculate the probability of getting tails on a coin flip. Since a coin has two sides, and only one side is tails, the probability is 1/2.

To find the combined probability of both events happening together, we multiply the probabilities of the individual events:

Combined Probability = Probability (Number > 4) × Probability (Tails) = (1/3) × (1/2)

Therefore, the combined probability is:

(1/3) × (1/2) = 1/6

Answer:

Claire should place the mirror 6 and 1/4 (6.25) inches from each corner of the wall in order for the mirror to be centered.  

Step-by-step explanation:

In order to find out how far the mirror would need to be set from each corner of the wall, you need to first take the total length of the wall and subtract the total width of the mirror:  31 - 18.5 = 12.5.  12.5 inches is the amount of wall space that would be left when the mirror is hanging.  In order for the mirror to be centered, we need to take the amount of wall space left and divide by two (2) to find the measurement from each corner:  12.5 ÷ 2 = 6.25 or 6 1/4.  By placing the mirror 6.25 inches from each corner of the wall, the mirror will be centered on the wall.

Answer:

15.8 to nearest tenth.

Step-by-step explanation:

Using the distance formula to find the lengths of the 3 sides:

AC = √ [(5-0)^2 + (-1- -3)^2] = √(25+4)

= √29.

BC = √[(-1--0)^2 + (1- -3)^2)] = √17

AB =  √[(5- -1)^2 + (-1-1)^2)] = √40

The perimeter = √29. + √17. + √40

=  15.8 to nearest tenth.

Answer:

[tex]x^2+y^2-8x-4y+11=0[/tex]

Step-by-step explanation:

We want to find the equation of the circle: [tex](x-4)^2+(y-2)^2=9[/tex] in general form.

We need to expand the parenthesis to obtain: [tex]x^2-8x+16+y^2-4y+4=9[/tex]

This implies that:

[tex]x^2+y^2-8x-4y+20=9[/tex]

We add -9 to both sides of the equattion to get:

[tex]x^2+y^2-8x-4y+20-9=0[/tex]

Simplify the constant terms to get:

[tex]x^2+y^2-8x-4y+11=0[/tex]

The general form of the equation is x^2 + y^2 - 8x -4y - 11 = 0

The equation is given as:

(x-4)^2+(y-2)^2=9

Evaluate the exponents

x^2 - 8x + 16 + y^2 -4y + 4 = 9

Collect like terms

x^2 - 8x +  y^2 -4y - 9 + 16 + 4 = 0

Evaluate the like terms

x^2 - 8x +  y^2 -4y - 11 = 0

Rewrite as:

x^2 + y^2 - 8x -4y - 11 = 0

Hence, the general form of the equation is x^2 + y^2 - 8x -4y - 11 = 0

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Answer:

the desired equation is y = 4x + 1

Step-by-step explanation:

As we move to the right from (-9, -35) to (2, 9), x increases by 11 and y increases by 44.  Thus, the slope of the line in question is

m = rise / run = 44/11 = 4.

Using the slope-intercept form of the equation of a straight line, we substitute 4 for m, 2 for x and 9 for y, obtaining:

y = mx + b →  9 = 4(2) + b.  Thus, b = 1, and the desired equation is

y = 4x + 1

By using the slope-intercept form of a line and the given anchor points, we find that the equation of the line is y= 4x - 1.

The subject of this question is to find the equation of a trend line using two anchor points (-9,-35) and (2,9). We can calculate the equation of a line using the slope-intercept form y = mx + b, where m represents the slope and b represents the y-intercept.

First, calculate the slope (m) which is (y2-y1)/(x2-x1) = (9 - (-35))/(2 - (-9)) = 44/11 = 4.

Then, with the slope (m = 4) and one point (2,9), plug in these values into the slope-intercept form to solve for the y-intercept (b). 9 = 4*2 + b. Solving for b gives -1.

So, the equation of the trend line is y= 4x - 1.

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Answer:

A, g(x) = 7x + 5

Step-by-step explanation:

applying these translations to the parent function f(x) = x, we would get the following equation:

g(x) = 7x + 5

a vertical compression is written before the parent function (in this case f(x)=x), and a shift up is written next to the function. both of these are without parentheses

the answer would be A, g(x) = 7x + 5

Answer:

It's the first choice.

Step-by-step explanation:

cos θ  = √(1 - sin^2 θ ) and cos θ  will be positive because  sin θ > 0  tan θ > 0. The angle  θ  will be in the first quadrant.

cos  θ  = √( 1 - (2/7)^2)

cos  θ = √(1 - 4/49) = √(45/49)

cos  θ  = √9√5 / 7

cos  θ  = 3√5 / 7.

Answer:

3 square root of 5 over 7. it's positive answer because both sin and tan are positive meaning they are sitting in the first quadrant were all ∅'s are positive

Step-by-step explanation:

Answer:

1) f

4 * ¼ = 1 (Multiplicative inverse property)

2) c

6 * 1 = 6 (Identity property of multiplication)

3) h

5 + 7 = 7 + 5 (Commutative property of addition)

4) j

If 5 + 1 = 6 and 4 + 2 = 6, then 5 + 1 = 4 + 2 (Transitive property)

5) a

4(x - 3) = 4x - 12 (Distributive property)

6) i

3(5) = 5(3) (Commutative property of multiplication)

7) k

Rules that allow us to take short cuts when solving algebraic problems.(Properties)

8) d

5 * (3 * 2) = (5 * 3) * 2 (Associative property of multiplication)

9) g

4 + (-4) = 0 (Additive inverse property)

10) e

2 + 0 = 2 (Identity property of addition)

11) b

A + (B + C) = (A + B) + C (Associative property of addition)

A triangle is 180°. So you can do:

3.2n + 6.4n + 2.4n = 180   Simplify

12n = 180

n = 15   Now that you know the value of n, you can plug it into each individual angle/equation

∠X = 3.2n    plug in 15 for n

∠X = 3.2(15)

∠X = 48°

∠Y = 6.4(15)

∠Y = 96°

∠Z = 2.4(15)

∠Z = 36°

Hi again.

Answer

= option d, 225π mm^2

Circumference = 2πr

30π = 2πr

30 = 2r

30 / 2 = r

15 = r

Area = π[tex]r^{2}[/tex]

[tex]15^{2}[/tex]π

225π

The area of the circle in terms of the π will be 225π mm²

The area of the circle is defined as the space occupied by the circle in the three-dimensional plane. The circle is the locus of the point equidistant from its centre.

It is given in the question that:-

Circumference = 2πr

30π = 2πr

30 = 2r

30 / 2 = r

15 = r

Area = πr²

Area =π(15)²

Area = 225π  mm²

Hence the area of the circle will be 225π  mm²

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