Bob has 99 dimes and quarters worth $21. how many of each does he have

Step-by-step explanation:

d + q = 99d = 99 - q

0.10d + 0.25q = 21

0.10(99 - q) + 0.25q = 21

9.9 - 0.10q + 0.25q = 21

-0.10q + 0.25q = 21 - 9.9

0.15q = 11.1

q = 11.1 / 0.15

q = 74 < he has 74 quarters

d = 99 - q

d = 99 - 74

d = 25 <=== he has 25 dimes

check...

0.10d + 0.25q = 21

0.10(25) + 0.25(74) = 21

2.50 + 18.50 = 21

21 = 21 (correct)

120 seems like the most sensible answer.

step-by-step explanation:

if there is only one topping on all caramel apples and there's 120 of them. then all apples should/will be covered in sprinkles. make sense?