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postorivofarms
17.07.2019 •
Mathematics
The coins in the stores register total $12.50. the register only contains nickels, dimes, and quarters. there are twice as many dimes as nickels. there are also twice as many quarters as dimes. how many quarters are in the register?
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Ответ:
(0.05 * (28 - d)) + 0.10d = 1.951.40 - 0.05d + 0.10d = 1.951.40 + 0.05d = 1.951.40 - 1.40 + 0.05d = 1.95 - 1.400.05d = 0.55d = 11 Step Three:n = 28 - dn = 28 - 11n = 17 Your answer should be 17 nickels and 11 dimes. You can double check by applying the variables into both formulas. n + d = 2817 + 11 = 2828 = 28
0.05n + 0.10d = 1.95(0.05 * 17) + (0.10 * 11) = 1.950.85 + 1.10 = 1.951.95 = 1.95 I hope this helps.
Ответ: