Question

Jada had some dimes and quarters that had a total value of $12.50. The relationship between the number of dimes, d , and the number of quarters, q , can be expressed by the equation

01.d + 0.25q = 12.5.
1. if Jada has 30 dimes, how many quarters does she have?
2. Is the number of quarters a function of the number of dimes? If yes, write a rule (that starts with q = ...) that you can use to determine the output, q , from a given input, d. If no, explain why not.

Answer 1

1: she has 38 quarters 2: yes

Explanation:

1: .10 x 30 = 3

.25 x 38 = 9.50

9.50 + 3 = 12.50

2: q= .10d + 9.50