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BigorU [14]
3 years ago
15

Please Help!!!

Mathematics
1 answer:
vaieri [72.5K]3 years ago
7 0

I DON'T UNDERSTAND MATH ANYMORE!!!!!!!!

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You have 20 coins in your pocket that are either quarter or dimes. They total $3.95. How many quarters do you have? A.16 B.13 C.
bekas [8.4K]

Answer:

B. 13

Step-by-step explanation:

Solve this by setting up system of equations:

0.25x + 0.10y = 3.95

x + y = 20

x equals the number of quarters and y equals the number of dimes. 0.25 is the value of a quarter and 0.10 is the value of a dime.

1. Multiply one equation to have the same coefficient as the other

0.10 · (x + y = 20) = 0.10x + 0.10y = 2

2. Subtract to find the value of one variable

 0.25x + 0.10y = 3.95

<u>- 0.10x + 0.10y = 2</u>

0.15x = 1.95

3. Solve for x by dividing both sides by 0.15

x = 13

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3 years ago
PLEASE HELP!!! PLEASE DONT ANSWER IF U DONT KNOW!
timofeeve [1]

Answer:

x^2 - y^2) - (x^2 -3x +2)

Step-by-step explanation:

3 0
3 years ago
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Show away to count from 668to900 using ones,ten,and hundred
sweet [91]
Not sure what you mean, exactly, but Ill try.

668, using 2 ones, go to 670. Using 3 tens, go to 700. Using 2 hundreds get to 900. Hope this helped :)
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3 years ago
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The answer is 44%.!!!!!!!!!!!!!!!!!!!!!!!!!!!
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I dont understand this question
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I have no clue what grade are you in
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