sayrieee
08.07.2019 •
Mathematics
Timed test what is the value of x? a: x=23 b: x=35 c: x=58 d: x=93
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Ответ:
17 dimes
Step-by-step explanation:
The given relations can be satisfied by 12 combinations of coins, but the question only asks about one of them: the maximum number of dimes when there are 2 quarters.
When there are 2 quarters, the problem reduces to finding the maximum number of dimes such that the number is at least 15 -2 = 13 and has a value at most $2.25 - 2×$0.25 = $1.75.
The number of dimes cannot be $1.75/$0.10 = 17.5, but it can be 17. That number is more than 13, so ...
the maximum number of dimes Ava could have is 17.