15-12-2015
Mathematics

contestada

in a pile of coins there are seven more quarters and nickels. If there is a total of $2.65, how many quarters are there

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wittlelor wittlelor

15-12-2015

let n be # of nickels
let (n + 7) be # of quarters

convert 2.65 to cents:
2.65 = 265

5n + (25n + 175) = 265
30n + 175 = 265
30n = 90
n = 90/30
n = 3

answer: 3 nickels, 10 quarters

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