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April 26, 2015

Homework Help: Math

Posted by ilovepink on Thursday, October 15, 2009 at 4:25pm.

Sarah is two-thirds as old as Jenny. Jenny is 7 years older than Sarah. Which system of equations could be used to find the girls’ ages?

A. 3s – 2j = 0
j – 7 = s

B. j = 2/3s
s + 7 = j

C. j – 2/3 = s
j – s = 7

D. 2/3j = s
j + 7 = s

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