Math

A phone company offers two monthly plans. Plan A costs $18 plus an additional $0.10 for each minute of calls. Plan B costs $22 plus an additional $0.08 for each minute of calls.

For what amount of calling do the two plans cost the same?

What is the cost when the two plans cost the same?

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  1. A
    y = .10 x + 18

    B
    y = .08 x + 22

    so
    the same y when
    .08 x + 22 = .10 x + 18
    .02 x = 4
    x = 4/.02 = 200 minutes
    now go back and use either original equation to get y, the cost

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    Damon

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