Audrey has 32 dimes and quarters in her piggy bank with a total value of $6.50. how many of the coins are dimes and how many are

Question

Ahat [919]

3 years ago

6

Audrey has 32 dimes and quarters in her piggy bank with a total value of $6.50. how many of the coins are dimes and how many are

quarters?

Mathematics

1 answer:

fgiga [73] · Answer 1 · 2022-08-10T12:47:15+03:00

fgiga [73]3 years ago

7 0

D + q = 32....d = 32 - q
0.10d + 0.25q = 6.50

0.10(32 - q) + 0.25q = 6.50
3.20 - 0.10q + 0.25q = 6.50
-0.10q + 0.25q = 6.50 - 3.20
0.15q = 3.30
q = 3.30 / 0.15
q = 22 <=== 22 quarters

d + q = 32
d + 22= 32
d = 32 - 22
d = 10 <=== 10 dimes