Question

A purse containing $3.20 in quarters and dimes has, in all 20 coins. Find the number of each kind of coin. A purse containing $3.20 in quarters and dimes has, in all 20 coins. Find the number of each kind of coin. @Mathematics

Answer 1

help me with this question

Answer 2

8 quarters 12 dimes

Answer 3

i need how you got it?

Answer 4

Let x = the number of quarters
Then 20-x = the number of dimes
25x + 10(20-x) = 320 ALL CENTS
25x +200 - 10x = 320
15x = 120
x = 8 quarters
20-x = 12 dimes

Answer 5

ok

x = number of quarters

number of dimes = 20 - x

0.25(x) + 0.1(20-x) = 3.20

0.25x + 2 - 0.1x = 3.20

0.25 - 0.1x = 3.20 - 2

0.15x = 1.20

x = 8 quarters

20 - 8 = 12 dimes