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OpenStudy (anonymous):
Solve using the guess-and-test strategy. Ira has 28¢ in his pocket. He has 20 coins that are either pennies or nickels. How many nickels does Ira have? A.26 B.22 C.18 D.2
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OpenStudy (zzr0ck3r):
Only one option makes sense; if you have 4 or more nickles, then you must have more than 18 cents.
OpenStudy (wolf1728):
You can set up 2 equations P + N = 20 (coins) .01P + .05N = .28 Solve for P and N and you have your answer.
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