Mathematics
ValorieZipay731
2015-11-06 20:31:27
Andy has 26 coins made up of quarters and half dollars, and their total value is $11.50. How many quarters does he have?
ANSWERS
CorneliusAmmerman834
2015-11-06 22:47:49

44 quarters is what he has the 50 cent is a half dollar

Lorraineeee
2015-11-06 22:49:04

x = number of quarters y = number of half x + y = 26   => y = 26 - x x * $0.25 + y * $0.5 = $11.50 so x * 0.25 + (26 - x) * 0.5 = 11.5 x * (0.25 - 0.5) = 11.5 - 26*0.5 x * (-0.25) = 11.5 - 13 = -1.5 x = (-1.5)/(-0.25) = 6 He have 6 quarters and 20 half dollars

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