Brightstorm Q & A : Media services charge 20 for phone and 30 a month for economy plan. C=30t+20 describes the total cost, c,  for t months. what is the total cost for 4 months of service?

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answer #1

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lqez now

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This is so easy. Just replace t with 430 * ( 4 ) + 20 So the cost is 140.

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Bjorn007 May 27, 2011

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C=30*4+20, 120+20=140, C=140

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Roadrunner May 29, 2011

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