Answers

2014-02-21T16:51:25+08:00
Jimmy's age—x: 
x(2x + 6) = 360 
2x² + 6x = 360 
x² + 3/2x = 180 + (3/2)² 
x² + 3/2x = 720/4 + 9/4 
(x + 3/2)² = 729/4 
x + 3/2 = 27/2 
x = 24/2 or 12 

Answer: 12 is Jimmy's age. 

Proof—the product of their ages is 360: 
= 12(2[12] + 6) 
= 12(24 + 6) 
= 12(30) 
= 360
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