1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
grigory [225]
3 years ago
8

A coin bank contains only quarters and dimes. The total value of the coins in the bank is $8.80. If the dimes were quarters and

the quarters were dimes, the coins' total value would be $7.30. Find the number of dimes in the bank
PLEASE EXPLAIN ANSWER
Mathematics
1 answer:
masha68 [24]3 years ago
8 0

Answer:

  • 18 dimes

Step-by-step explanation:

Let the number of dimes be d and quarters be q

<u>The value is $8.80 = 880¢, so:</u>

  • 10d + 25q = 880 ⇒ 2d + 5q = 176

<u>If the dimes were quarters and the quarters were dimes, the coins' total value would be $7.30 or 730¢</u>

  • 25d + 10q = 730 ⇒ 5d + 2q = 146

<u>Now we have 2 equations. Solving the system by elimination, subtract 5 times the second equation from twice the first equation:</u>

  • 2(2d + 5q) - 5(5d + 2q) = 2(176) - 5(146)
  • 4d - 25d = -378
  • -21d = -378
  • d = -378/-21
  • d = 18
You might be interested in
What is the cost of buying 10 tickets? <br> what is the unit rate?
Pepsi [2]

Answer:

This depends on the price of how much the tickets cost in total so if the 10 tickets cost $10 dollars then the unit price would be $1

Step-by-step explanation:

You need to divide the total number by the number 10 and then that would be your unit price.

4 0
2 years ago
Help! This is so confusing please
Rus_ich [418]

Given equation is f(x)=6^x

Now it says to find f(2)

that simply means plug x=2 because we see that 2 is written in place of x in f(x) and f(2)

f(2)=6^2

f(2)=6*6

f(2)=36

Hence final answer is f(2)=36

4 0
3 years ago
Read 2 more answers
F(x) = 2-4<br> Find f(2)
Jet001 [13]

Answer:

-8

Step-by-step explanation:

So first off, x is 2-4. So that's the default. It would be -2. If you multiply -2 by 2, it is -4.

8 0
1 year ago
Select all the statements that are true for the graph shown.
Afina-wow [57]

but I think it's -25 because it's on the bottom of -24

7 0
3 years ago
Explain how to divide an amount by 3
DENIUS [597]
To divide by three you have to put it on the outside of the box.

For example:
Sophie has 6 cookies. She wants to separate them into 3 groups. 

I've attached a picture for you explaining the steps. :) Let me know if you need more help!

5 0
3 years ago
Other questions:
  • A certain forest covers an area of 3400 km2 . suppose that each year this area decreases by 7.75% . what will the area be after
    8·1 answer
  • Using 3.14 for π, what is the volume of a ball with a diameter of 7 centimeters
    13·1 answer
  • Please help :) im giving brainlyyyy
    6·1 answer
  • Which expression is equivalent to 1/3(4x+9)+5x?
    12·2 answers
  • Drag the tiles to the correct boxes to complete the pairs.
    8·2 answers
  • PLEASE HELP!!! DUE AT 11:59!!!!
    10·1 answer
  • Can someone help me please? Ill mark brainliest c:
    6·1 answer
  • Is -17 rational or irrational with explanation
    9·2 answers
  • Responda as expressões 2x+3x+5x:​
    6·2 answers
  • Will mark as brainlist!!!!pls include steps ​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!