A number of dimes and quarters are worth $2.55. If the number od dimes and quarters were interchanged the resulting new amount would be $2.70. How many of each kind of coin were there before the interchange?

Answers

Answer 1

Answer:

8 dimes

7 quarters

Step-by-step explanation:

Let number of

Dimes = x ; quarters = y

10x + 25y = 255 ___(1)

25x + 10y = 270 ___(2)

From (1)

10x = 255 - 25y

x = (255 - 25y) / 10

x = 25.5 - 2.5y

Put x = 25.5 - 2.5y in (2)

25(25.5 - 2.5y) + 10y = 270

637.5 - 62.5y + 10y = 270

-52.5y = - 367.5

y = 367.5 / 52.5

y = 7

x = 25.5 - 2.5(7)

x = 25.5 - 17.5

x = 8


Related Questions


A. (-5,-)
B. (-2,-4)
C. (1.-6)
D. (-5.-5)

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Link with answer in it is at the top
It’s b the answer is (-2,-4) hope this helps!!!

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Answer:

z equals 13 yeeeeeeeeetttttttttttttt I hopppppeeeee thhhhhaaaaatttttt heeeeelllllllpppppppsssssss

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Answer:

B

Step-by-step explanation:

Since here, 100x = 1, and since we already have one, we can leave that aside. It would never be d because that is way larger. The second square is 6/100 and since earlier we said 100x = 1, we would have to make an equation. Your answer is B

Can someone please help me out!!!!

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Use the brainly math caculate and slove both problems then add it and what ever you get is the premiter

In the Figure, △ABC ≅ △FDE

Answers

The y in the equation is equal to 5

PLEASE HELP IM DESPRATE 50 POINTS

Explain a real world example of a combination where repetition is allowed. You need to EXPLAIN WHY, not just give an example.

Answers

A real world example where repetition is allowed is in the sport of archery, where players get multiple attempts to shoot an arrow as close to the center of the target as possible

Benji is conducting an experiment. He has 0.78 L of solution to divide evenly among 8 petri dishes. How much solution should he put in each petri dish? 0 7.22L 8.78 L 103 mL O 97.5 mL​

Answers

0.78 L of solution divided into 8 dishes so 97.5 :)

Answer:

97.5

Step-by-step explanation:

im on the review and I clicked check answer and got it right

The value of the power (-8) ti the second power is

Answers

Answer:

64

-8 to the second power is -8^2 Which is -8×-8 Which gives 64

A running track design is composed of two half circles connected by two straight-line segments. Garrett is jogging on the inner lane (with radius r) while Devin is jogging on the outer (with radius R). If r= 30 meters and R= 33 meters, how much longer does Devin have to run to complete one lap?​

Answers

Answer:

18.86 m

Step-by-step explanation:

From the given question, both covers the same distance of the straight line segment.

For the inner lane,

length of arc of its semicircle = [tex]\pi[/tex]r

                                   = 30 x [tex]\frac{22}{7}[/tex]

                                   = 94.2857

So that,

the total length for the two halves of the inner lane = 2 x 94.2857

                                                                  = 188.5714 m

For the outer lane,

length of arc of its semicircle = [tex]\pi[/tex]r

                                                 = 33 x [tex]\frac{22}{7}[/tex]

                                                 = 103.7143

The total length for the two halves of the outer lane = 2 x 103.7143

                                                                  = 207.4286 m

The difference between the two = 207.4286 - 188.5714

                                                       = 18.8572 m

Therefore, Devin would run 18.86 m more to complete one lap.

Explain in your own words why a constant has a degree of zero

Answers

Answer:

See below

Step-by-step explanation:

Because a constant never changes. It stays constant (it's in the word)! The function never changes since the slope is 0, therefore there's no vertical change.

Answer:

Step-by-step explanation:

The function value never changes and is always graphed as a horizontal line so theirs slopes become zero. This means there is no change that is vertical within and throughout the function.

Helped by the ONE & ONLY #QUEEN aka #DRIPPQUEENMO!!

HOPE THIS HELPED!!

A theme park has a ride that is located in a sphere. The ride goes around the widest circle of the sphere which has a circumference of 558.92 yd. What is the surface area of the​ sphere? Use 3.14 for Pi.

Answers

Answer:

99437

Step-by-step explanation:

Use the sphere formula 4pi r^2.

By the way, can you follow me on Brainly?

Thanks!

need help will give brainliest

Answers

Answer:

40.56

Step-by-step explanation:

2pir

8÷2=r=4

2pi4=25.13

25.13÷2=12.565

10+10+8+12.56=40.565

restaurant bill:$175 with a 20% tip what will the be the amount of tip​

Answers

Answer:

$35.00

Step-by-step explanation:

175 x .20=35

35......................

(175x.20=35)

Guys pls help me!!!!!!

Answers

Answer:

This would be graph A

Step-by-step explanation:

x = 2  means that it is a vertical ( up and down) line

It is a x=2

This would be graph A

Solve the equation

2.9=7.1 + y

Answers

Answer:

y=-4.2

Step-by-step explanation:

2.9=7.1+y

2.9-7.1=7.1-7.1 +y

-4.2=y or y= -4.2

y = -4.2

If you substitute that value for y into the equation, you'll get 2.9 = 7.1 + (-4.2)... and that is a correct, valid equation. HOPE THAT HELPS!

How many minutes are there in 12.5 hours?

Answers

Answer:

750 minutes

Step-by-step explanation:

Answer:

750 minutes would be your answer

Step-by-step explanation:

Which of the following correctly gives the center and radius of the circle defined by the equation (x - 7)2 + (x - 2)2 = 10? A. Center: (7, 2); Radius = 100 B. Center: (7, 2); Radius = 10 C. Center: (-7, -2); Radius = 100 D. Center: (-7, -2); Radius = 10​

Answers

Answer:

Center (7,2) and radius = 10

Step-by-step explanation:

Generally, we have the equation of a circle as follows;

(x-a)^2 + (y-b)^2 = r^2

where (a,b) represents the circle center and r represents the radius of the circle

Looking at the given equation of a circle, we have it that the center is (7,2) while the radius of the circle is 10

4 (– 2а – 6b + 5а — 1)

Answers

Answer:

Evaluate: 12a - 24b - 4

The answer to your problem is:12a-24b-4

plzzzzz help i really need it guys thxxxxxxxx!

Answers

Answer:

11. m=-1/4 b=5 equation is y=-1/4x+5

12.m=4/3 b=0 equation is y=4/3x

Step-by-step explanation:

Graham wants to determine which football team is the most popular at a game between the home team and the visiting team. Which of the following methods will give him the most accurate results?

Answers

i think that your answer the answer is A

What is the answer?
Please answer quickly!

Thank you so much

Answers

Answer:

x=11

Step-by-step explanation:

Hi, there you are using are multiplying so you have to add the exponets 3 and 8 which would equal to 11

5.
Write the inequality in words.

3n < 52

A. fifty-two less than three times n

B. Three times n is less than or equal to fifty-two.

C. Three times n is less than fifty-two.

D. Three times n is greater than fifty-two.

Answers

Answer:

C

Step-by-step explanation:

3n= 3 times n

And it is less than 52

Answer:

C. Three times n is less than fifty-two.

Step-by-step explanation:

What is the probability that the dice shows a 2?​

Answers

Answer:

1/6

Step-by-step explanation:

the probability of rolling a 2 is 1/6

Which of these is a simplified form of the equation 15x + 4 = 5 + 3x + 1x? (2 points)
0 3x = 9
0 3x = 11
O 11x = 9
0 11x = 1

Answers

Answer:

11x=1

Step-by-step explanation:

15x+4=5+3x+1x       Bring everything with an x in front of it to the left side

15x-3x-1x+4=5         Simplify the x values

11x+4=5                    Bring the 4 to the right side

11x=5-4

11x=1

How many choices do you have for your lunch if you pick either an orange or apple and pretzels or carrots to go with your sandwich?

Answers

Answer:

4

Step-by-step explanation:

So you can have

An orange + pretzels

An orange + carrots

Apple + pretzels

Apple + carrots

I think this is what they are asking for but I'm not sure

Solve the inequality. Graph the solution. −8≤2/5(k−2) The solution is .

Answers

Answer:

Step-by-step explanation:

Multiply both sides by 5(k - 2)

-8*5(k - 2) ≤2               Combine -8 and 5

-40 (k - 2) ≤2                Remove the brackets

-40k + 80 ≤2               Subtract 80 from both sides

-40k ≤ -78                    Here's the trick part. Pay attention. Divide by - 40

k ≥ - 78 /- 40

k ≥ 1.95

Did you see what happened? The ≤ operation turned into ≥ That always happens when dividing by a minus or multiplying by a minus or if you change the side where literal coefficient is.

   

Tell whether the side lengths 18, 24, and 30 would form a right triangle?*
O Yes
O No
O Not enough information

Answers

Answer:

yes 18 24 and 30 does form a right triangle

A trapezoid with a height of 8 ft base measuring 11 ft has an area of 112ft find the length of the other base

Answers

Answer:

1.27272727273 I think

Step-by-step explanation:

I need help. i cant figure it out. please someone help.

Answers

Answer:

Step-by-step explanation:

Answer:

.eooekekenenenenesususu

Explain why that price seems to be a linear function of the number of boxes ordered?
Heeeeeelp

Answers

Answer:

Step-by-step explanation:

Because it's adding by a constant I'm pretty sure

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