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by rekhamadan
Mon Mar 02, 2009 8:48 pm
 
Forum: Manhattan Prep GMAT Non-CAT Math
Topic: strategy guide 3, chapter 4, in action solution #17.
Replies: 1
Views: 992
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strategy guide 3, chapter 4, in action solution #17.

I think the answer published in the guide is incorrect.
it should be 360, correct?
they inaccurately labeled s2 as 15 instead of 45.
Thanks!
by rekhamadan
Tue Mar 03, 2009 1:24 am
 
Forum: Manhattan Prep GMAT Non-CAT Math
Topic: study guide chapter 3 , in action problem 4.
Replies: 1
Views: 938
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study guide chapter 3 , in action problem 4.

my frist step was to square both sides of the equation, including the 5 - so it became 25.
then i subtracted 25 from both sides and, and had -y^2 = -16
so y = +/-4.

i understand how the book solved the problem, but i dont understand why my method didnt work.