I have 60 coins both quarters and dimes. The combined total is 9.45. What are two equations I can use to solve this problem?

Answer:

the rope is 25 inches long

1. 20×5=100%

2. 5×5=25 inches

3. 100% of the rope is equal to 25 inches

Final answer:

The entire rope is 25 inches long, as the given 5-inch section is 20% of the whole rope, and multiplying by 5 gives us the full length.

Explanation:

If a section of rope 5 inches long represents 20% of the length of the entire rope, we can find the full length of the rope by setting up a proportion. Considering that 20% is equivalent to the fraction 1/5, we would multiply the length of the shortened rope by 5.

The calculation would be as follows:

5 inches (given length representing 20%) × 5 (since 20% is 1/5 of 100%) = 25 inches.

Thus, the entire length of the rope would be 25 inches.

39 ft of carpet

11x3+3x2=39

Answer:

yes

Step-by-step explanation:

can i get brainliest please and thank you.

Step-by-step explanation:

Given triangle is 30°, 60° & 90° angled triangle.

We know that in 30°, 60° & 90° angled triangle. Side opposite to 30° is half of hypotenuse and side opposite to 60° is root 3 upon 2 times of hypotenuse.

[tex] \therefore \: 9 = \frac{1}{2} \times y \:\:\:(side \: opposite \: to \: 30 \degree)\\ \\ \therefore \: 9 \times 2 = y \\ \\ \therefore \:y = 18 \: units \\ \\ next \\ \\ x = \frac{ \sqrt 3}{2} \times y \:\:\: (side \: opposite \: to \: 60 \degree)\\ \\ \therefore \: x = \frac{ \sqrt 3}{2} \times 18 \\ \\\therefore \: x = \sqrt 3 \times 9 \\ \\ \therefore \: x = 9 \sqrt 3 \: units[/tex]

Quadratic equation is x² - x - 30

Step-by-step explanation:

⇒ Factors are (x - 6) and (x + 5)

⇒ (x - 6)(x + 5) = x² + 5x - 6x - 30 = x² - x - 30

n(AxB) = 25

Step-by-step explanation:

AxB in sets is called Cartesian product. And is defined as a set of ordered pairs (a,b) where a belongs to A and b belongs to B.

Given

A = {a,b,c,d,e}

B = {1,2,3,4,5}

The number of elements for Cartesian product of two sets is determined by:

[tex]n(AxB) = n(A) * n(B)[/tex]

Here

[tex]n(A) = 5\\n(B) = 5[/tex]

So,

[tex]n(AxB) = 5*5 = 25[/tex]

Hence,

n(AxB) = 25

Keywords: Sets, Cartesian Product

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The value of n(AxB) is 25

Given the following sets

A= {a,b,c,d,e} and let B= {1,2,3,4,5}, we are to determine n(AxB)

n(A) = 5 (number of elements in the set)

n(B) = 5

Get the cardinality of n(AxB)

Hence the value of n(AxB) is 25

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Answer:

Option C. X=A/4

Step-by-step explanation:

we know that

The area of the rectangular post it note is equal to

[tex]A=LW[/tex]

where

L is the length

W is the width

In this problem we have

[tex]W=4\ in[/tex]

[tex]L=X\ in[/tex]

substitute

[tex]A=4X[/tex]

solve for x

That means ----> isolate the variable x

Divide by 4 both sides

[tex]X=\frac{A}{4}[/tex]

The radius of a circle with center at  [tex]C (0, 4)[/tex] and point [tex]P(-2, -1)[/tex] will be [tex]\sqrt{29}[/tex].  

Equation of a circle is written in the form of [tex](x-h)^2+(y-k)^2=r^2[/tex]  where [tex](h,k)[/tex]  represents the center and  [tex]r[/tex]  is the radius.

We have,

Center at  [tex]C (0, 4)[/tex]

i.e. [tex]h=0,\ k=4[/tex]

And,

Point  [tex]P(-2, -1)[/tex]

i.e. [tex]x=-2,\ y=-1[/tex]

Now,

To determine Radius of the circle;

[tex]r^2=(x-h)^2+(y-k)^2[/tex]

[tex]r^2=(-2-0)^2+(-1-4)^2[/tex]

[tex]r^2=(-2)^2+(-5)^2[/tex]

[tex]r=\sqrt{4+25}[/tex]

[tex]r=\sqrt{29}[/tex]

So, radius of the circle is [tex]\sqrt{29}[/tex] , which is find out using equation of a circle.

Hence, we can say that the radius of a circle with center at  [tex]C (0, 4)[/tex] and point [tex]P(-2, -1)[/tex] will be [tex]\sqrt{29}[/tex].

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The length of the radius of the circle is sqrt(29) or approximately 5.39 units.

To find the length of the radius of a circle, we can use the distance formula. The distance between the center of the circle (0, 4) and the point on the circle (-2, -1) is given by:

d = sqrt((x2-x1)^2 + (y2-y1)^2)

Plugging in the values, we get:

d = sqrt((-2-0)^2 + (-1-4)^2)

d = sqrt((-2)^2 + (-5)^2)

d = sqrt(4 + 25)

d = sqrt(29)

Therefore, the length of the radius of the circle is approximately sqrt(29) or 5.39 units.

Answer:

Therefore the x-coordinate of the solution to this system is 2.4.

Step-by-step explanation:

Given system of equation is

      3x-y=6............(1)

and 2x+y=6...........(2)

Adding equation (1) and (2)

3x -y+2x-y=6+6

⇔5x =12

[tex]\Leftrightarrow x=\frac{12}{5}[/tex]

⇔x = 2.4

Putting the value of x in equation (1)

3×2.4 - y =6

⇔7.2 -y = 6

⇔y = 7.2-6

⇔y=1.2

Therefore the x-coordinate of the solution to this system is 2.4.

Step-by-step explanation:

Answer:

slope: 0

Step-by-step explanation:

y=6

no matter what x is, y is always going to equal 6

Answer:

The domain is [1,∞)

Step-by-step explanation:

The given functions are:

[tex]a(x)=3x+1[/tex]

and

[tex]b(x) = \sqrt{x - 4} [/tex]

We want to find the domain of

[tex](b\circ a)= \sqrt{3x + 1 - 4} [/tex]

Simplify to get:

[tex](b\circ a)= \sqrt{3x -3} [/tex]

This function is defined when the expression under the radical is greater or equal to zero.

[tex]3x -3 \geqslant 0 \\ x \geqslant 1[/tex]

Answer:

C on Edge 2021

Step-by-step explanation:

Took the test

Answer:

5x+2x-2y

7x-2y

Step-by-step explanation:

Answer:

7x-2y

Step-by-step explanation:

distribute the 2 to the numbers in the parenthesis then combine like terms

Answer:

answer is attached in the image below

Question:

A shopper bought a watermelon, a pack of napkins, and some paper plates. In his state, there is no tax on food. The tax rate on non-food items is 5%. The total for the three items he bought was $8.25 before tax, and he paid $0.19 in tax. How much did the watermelon cost?

Answer:

Cost of watermelon is $ 4.45

Solution:

From given,

Total amount for three items before tax = $ 8.25

Tax amount = $ 0.19

Tax on non food = 5 %

Here, non food means napkin and paper plates

Let "x" be the cost spent for napkin and paper plates

Then,

5 % = 0.19

100 % = x

This forms a proportion

[tex]5 \times x = 0.19 \times 100\\\\5x = 19\\\\x = 3.8[/tex]

Thus cost spent for napkin and paper plates is $ 3.8

Therefore,

Watermelon cost = total amount before tax - cost spent for napkin and paper plates

Watermelon cost = 8.25 - 3.8 = 4.45

Thus cost of watermelon is $ 4.45

The watermelon cost $4.45, calculated by subtracting the cost of the non-food items ($3.80) taxed at 5% from the total cost before tax ($8.25).

The information provided gives us the total cost before tax ($8.25) and the total tax amount ($0.19). Because only non-food items are taxed, and the tax rate is 5%, we can find the cost of the non-food items by dividing the total tax amount by the tax rate (expressed as a decimal).

Convert tax rate to decimal: 5% = 0.05

Divide the total tax by the tax rate: $0.19 / 0.05 = $3.80

Deduct the cost of the non-food items from the total cost before tax: $8.25 - $3.80 = $4.45

The cost of the watermelon, which is a food item and thus not taxed, is $4.45.

Answer:

d=60t

Step-by-step explanation:

Use the equation speed = distance / time

To get distance you do speed X time

D =60t shows that

The distance traveled  = 60t.

Distance exists defined to be the magnitude or extent of displacement between two positions. Distance traveled exists the entire length of the path traveled between two positions. Distance traveled exists not a vector.

The independent variable exists as t (hours) and the dependent variable exists as d (distance). The total distance (d) depends on the number of hours (t). As the hours increase, the distance will rise. The distance relies on the amount of time traveling.

Speed = distance / time

Therefore, Distance = speed [tex]*[/tex] time

Distance = 60t

Therefore, the correct answer is option A. d = 60t.

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Answer:

9/16 m.

Step-by-step explanation:

When you cut two pieces along its diagonal it causes it to be two congruent triangular pieces.

You need to multiply the length and the width to find an area:

1 1/2 × 3/4

Now you need to change it into an improper fraction:

1*2+1 = 2+1 = 3; this gives us 3/2:

3/2 × 3/4 = 9/8 = 1 1/8

Dividing it by 2:

9/8 ÷ 2

Answer:

84

Step-by-step explanation:

72/x = 6/7

muliply by x on both sides

72 = 6/7x

mulitply by 7 on both sides

504 = 6x

divide by 6 on both sides

84

Answer:84

Step-by-step explanation:

6*12=72

7*12=84

[tex]\(33 \frac{1}{3}\)[/tex] % of 687 is 229.

To find [tex]\(33 \frac{1}{3}\)[/tex] the percent of 687, you can first convert [tex]\(33 \frac{1}{3}\)[/tex]% to a decimal, then multiply by 687.

[tex]\[33 \frac{1}{3}\% = \frac{33\frac{1}{3}}{100} = 0.3333\][/tex]

Now, multiply this decimal by 687:

[tex]\[0.3333 \times 687 = 229\][/tex]

So, [tex]\(33 \frac{1}{3}\)[/tex] % of 687 is 229.

Correct question:

what is [tex]\(33 \frac{1}{3}\)[/tex]  of 687?

The solution of the inequality is 8.5 < x.

Solution:

Given inequality is 2x + 5 > 22.

2x + 5 > 22

Subtract 5 from both sides of the inequality.

2x + 5 – 5 > 22 – 5

2x > 17

Divide by 2 on both sides of the inequality.

[tex]$\frac{2x}{2}>\frac{17}{2}[/tex]

[tex]$x>\frac{17}{2}[/tex]

x > 8.5

8.5 < x

The graph of the solution is attached below.

Answer:

-15

Step-by-step explanation:

3 x 5 = 15

when negative numbers are multiplied by positive numbers the product will be negative.

Final answer:

The product of -3 and 5 is -15, as per the multiplication rules where a negative number multiplied by a positive number results in a negative product.

Explanation:

The product of -3 and 5 is -15. In mathematics, when we talk about the product of two numbers, we are referring to the result of multiplying them. According to multiplication rules, when two numbers have opposite signs, the product has a negative sign. If we multiply a negative number by a positive number, the answer will also have a negative sign.

It's important to remember that multiplication is commutative, meaning that changing the order of the numbers does not change the product. The key concepts are similar to those used when figuring out subtraction and addition of signed numbers. For example, subtracting a negative is the same as adding a positive.

If we apply this to -3 multiplied by 5, we multiply the absolute values (3 and 5) to get 15. Since we have one positive number (5) and one negative number (-3), our final product is -15.

Answer:11/12

Step-by-step explanation:

Answer:

0.785398163 rad

Step-by-step explanation:

The value of arctan(1) is equal to π/4 or 45 degrees.

The tangent of an angle is defined as the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.

For the angle whose tangent is 1, we can visualize a right triangle where the length of the side opposite to the angle is 1 and the length of the adjacent side is also 1.

Using the Pythagorean theorem, we can calculate the length of the hypotenuse:

hypotenuse² = opposite² + adjacent²

hypotenuse² = 1² + 1²

hypotenuse² = 1 + 1

hypotenuse² = 2

hypotenuse = √2

Now, we can use the definition of the arctan function to find the angle whose tangent is 1:

arctan(1) = angle whose tangent is 1 = angle whose opposite side is 1 and adjacent side is 1

This angle is a well-known special angle in trigonometry.

It is a 45-degree angle (π/4 radians) or a quarter of a full circle.

Therefore, arctan(1) is equal to π/4 or 45 degrees.

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Answer:

23.44%

Step-by-step explanation:

The probability of getting a 4 on the first 2 throws and different numbers on the last 5 throws = 1/6 * 1/6 * (5/6)^5

= 0.01116

There are 7C2 ways of the  2 4's  being in different positions

= 7*6 / 2 = 21 ways.

So the required probability =  0.01116 * 21

= 0.2344 or 23.44%.

Answer:

72 cubic ft

Step-by-step explanation:

To find volume you multiply length × width × height

Length is 4, width is 6 and height is 3

4×6×3= 72

Answer:

72 cubic ft

Step-by-step explanation:

Use the formula v= lxwxh

1. Write 6x4x3

2. 6x4=24

3. 24x3=72

***or***

1. 3x4=12

2. 12x6=72

Either way both equal 72 cubic ft

Answer:

  31 5/8 pounds

Step-by-step explanation:

The total weight is ...

  9(2 7/8 lb) + 2(2 7/8 lb) = (2 7/8 lb)(9 +1) = (23/8 lb)(11) = 253/8 lb

  = 31 5/8 lb

The total of package weights is 31 5/8 pounds.

Final answer:

The total weight of all ten packages that Jeff wants to mail is 31 5/8 pounds.

Explanation:

Jeff has ten packages to mail, with nine identical packages weighing 2 7/8 pounds each and one package weighing double the weight of one of the nine.

To find the total weight of all the packages, we first calculate the weight of the nine identical packages by multiplying their weight by the number of packages, which is:

2 7/8 pounds/package × 9 packages = 25 7/8 pounds

Next, we determine the weight of the tenth package:

2 × 2 7/8 pounds = 5 6/8 pounds, which simplifies to 5 3/4 pounds.

Finally, we add the total weight of the nine packages to the weight of the tenth package:

25 7/8 pounds + 5 3/4 pounds = 31 5/8 pounds.

Therefore, the total weight of all ten packages is 31 5/8 pounds.

Answer:

(-4,17)

Step-by-step explanation:

2x-3y=-11

2x+y=9

solve the equation

x=-4

2x+y=9

substitute the value of x into an equation

2×(-4)+y=9

solve the equation

y=17

A possible solution is

(-4,17)

check the solution

2×(-4)-3=-11

2×(-4)+17=9

simplify

-11=-11

9=9

the order pair is a solution

answer is (-4,17)

To solve the given system using the substitution method, solve the second equation for y, substitute into the first equation, and solve for x. Substituting x back into the expression for y gives the solution x = 2 and y = 5.

To solve the system of equations using the substitution method, we have to express one variable in terms of another from one of the equations and then substitute it into the other equation. For the given system of equations:

First, we solve the second equation for y:

y = 9 - 2x

Now we substitute this expression for y into the first equation:

2x - 3(9 - 2x) = -11

2x - 27 + 6x = -11

8x - 27 = -11

8x = 16

x = 2

After finding x, we can substitute x back into y = 9 - 2x to find the value of y:

y = 9 - 2(2)

y = 9 - 4

y = 5

The solution to the system of equations is x = 2 and y = 5.

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Answer:

1. a. 72/100 = 324/x

72x = 32,400

b. 450 students are in Math 6

2. a. o = 3b

b. o = 3 pounds

3. a. Most popular animals:

A. Dogs - 67%

B. Cats - 20%

C. Other - 8%

D. None - 4%

E. Horses - 1%

b.  20 students

c. If 75 students have cats, the estimate of 250 students isn't correct.

The actual number of students interviewed is 375.

Step-by-step explanation:

1. a. Let's use the following equation to solve the question:

x = Students that are in Math 6

72/100 = 324/x

72 * x = 324 * 100

72x = 32,400

b. Let's solve the equation, as follows:

x = 32,400/72

x = 450

450 students are in Math 6

2. a. The equation is:

o = 0.15 *20b

o = 3b

where, o = weight of oats in pounds and b = number of dog food bags

b. Let's find out the weight of the oats in one dog food bag, using our equation:

o = 0.15 *20b

o = 0.15 *20 * 1

o = 3 pounds

3. a. Most popular animals:

A. Dogs - 67%

B. Cats - 20%

C. Other - 8%

D. None - 4%

E. Horses - 1%

b. If 250 students were interviewed, the 8% who answered "other" are:

8% of 250 = 0.08 * 250 = 20 students

c. If 75 students have cats, the estimate of 250 students isn't correct.

The 20% of 250 is 50, not 75.

0.2 * 250 = 50

The actual number of students interviewed is:

x = Actual number of students interviewed

75/x = 20/100

20x = 7,500

x = 7,500/20

x = 375

The actual number of students interviewed is 375.

(a) Jason arrives at the factory first

(b) It takes 5 minutes until the other person arrives

Step-by-step explanation:

Jason and Jeremy work together at a juggling-ball factory

We need to know who arrives at the factory first and how long it is until the other person arrives

Time = Distance ÷ speed

∵ Jason lives 25 miles away from the factory

∴ The distance = 25 miles

∵ He drives at 60 miles per hour

∴ The speed = 60 miles per hour

- Use the rule above to find the time

∵ Time = 25 ÷ 60 = [tex]\frac{5}{12}[/tex] hour

∵ 1 hour = 60 minutes

∴  [tex]\frac{5}{12}[/tex] hour =  

∴ Jason arrives to the factory in 25 minutes

∵ Jeremy lives 35 miles away from the factory

∴ The distance = 35 miles

∵ He drives at 70 miles per hour

∴ The speed = 60 miles per hour

- Use the rule above to find the time

∵ Time = 35 ÷ 70 = [tex]\frac{1}{2}[/tex] hour

∵  [tex]\frac{1}{2}[/tex] hour =  

∴ Jeremy arrives to the factory in 30 minutes

∵ They leave their houses at the same time

∵ 25 minutes < 30 minutes

∴ Jason arrives first

(a) Jason arrives at the factory first

∵ Jason arrives to the factory in 25 minutes

∵ Jeremy arrives to the factory in 30 minutes

∵ 30 - 25 = 5 minutes

∴ Jeremy arrives after Jason by 5 minutes

(b) It takes 5 minutes until the other person arrives

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Final answer:

Jason arrives at the factory first, taking approximately 25 minutes, while Jeremy arrives 5 minutes later, taking around 30 minutes to reach.

Explanation:

The question involves calculating time taken for different scenarios involving motion and relative speed. In the given scenario, Jason lives 25 miles away from the factory and drives at 60 miles per hour, while Jeremy lives 35 miles away and drives at 70 miles per hour. To find out who arrives at the factory first, we calculate the time each person takes to reach the factory.

For Jason: Time = Distance / Speed = 25 miles / 60 mph = 0.4167 hours.
For Jeremy: Time = Distance / Speed = 35 miles / 70 mph = 0.5 hours.
Clearly, Jason will arrive first.

The difference in arrival time between Jeremy and Jason is:
Jeremy's time - Jason's time = 0.5 hours - 0.4167 hours = 0.0833 hours, which is 5 minutes.

Jason arrives at the factory first, and Jeremy arrives 5 minutes later.

Answer:

x=2i, -2i

Step-by-step explanation:

Answer:

2,-2 or maybe no real solutions but i went with 2,-2

Step-by-step explanation: