Mathematics, 17.07.2019 11:00 sonyfan
Aperson has 20 coins, all nickels and dimes, worth one dollar and 40 cents. how many nickels are there? if n = number of nickels and d = number of dimes, which system of equations represents the problem? n + d = 20 and n + d = 1.40n + d = 20 and 5n + 10d = 1.40n + d = 20 and 5n + 10d = 140
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Aperson has 20 coins, all nickels and dimes, worth one dollar and 40 cents. how many nickels are the...
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