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3 years ago

9

3. Theresa has 20 coins that are dimes and quarters. Together

1 answer:

KiRa [710]3 years ago

3 0

Answer:

15 dimes
5 quarters

Step-by-step explanation:

Let q represent the number of quarters Theresa has. Then the value of her coins is ...

0.25q + 0.10(20 -q) = 2.75

0.15q = 0.75 . . . . . . . . . subtract 2.00, collect terms

q = 0.75/0.15 = 5

Theresa has 5 quarters and 15 dimes.

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Read 2 more answers