Brightstorm Q & A : what is 2a+3a if a=15

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answer #1

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This link may help: http://www.brightstorm.com/d/math/s/algebra/u/pre-algebra/t/defining-variablesReplace all the a's with 15s.2(15)+3(15)Use the order of operations, beginning with multiplication. (PEMDAS)30+45Add the two numbers together.75

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2724

Peter276 December 24, 2009

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Replace every letter a with 15 and simplify. 2(15) + 3(15) = 30 + 45 = 75 The answer is 75

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2727

mathguy December 24, 2009

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