Posted by i could not do it can u?? on Monday, February 25, 2013 at 1:28am.
a,b and c are real numbers such that ab=44, bc=112 and a+c=13. What is the value of b?

algebra  Damon, Monday, February 25, 2013 at 1:31am
a = 44/b
c = 112/b
so
44/b + 112/b = 13
156 = 13 b
b = 12 
algebra  Calvin Lin, Tuesday, February 26, 2013 at 8:49pm
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Calvin Lin
Brilliant Challenge Master