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GRE Math Formulas and Strategies
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Multiple choice questions
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1. What is the formula for a mixture of 2 components
|a+b|<=|a|+|b|
The resulting equation is inversely proportional (not proportional, like a baking recipe). So, set up a proportional equation and then flip one of the sides. It is important to use the same units on each side! 15/9 = 21/x -> 15/9 = x/21 -> x=35.
(m+c_A)*f_O=c_O
(l+2s)(w+2s)
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