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2 years ago

A cell phone company offers two plans.

Mathematics

1 answer:

Aneli [31]2 years ago

3 0

Answer:

80 minutes

Step-by-step explanation:

Represent Plan A as y = $26.50 + ($0.35/min)x, where x is the number of minutes consumed.

Represent Plan A as y = $42.50 + ($0.15/min)x

We set these two equations equal to one another and solve for x, the number of minutes at which the costs of the two plans are momentarily equal:

y = $26.50 + ($0.35/min)x = y = $42.50 + ($0.15/min)x

Combining like terms, we get: ($0.20/min)x = $16.00

$16.00

Then x = -------------------- = 80 minutes

($0.20/min)

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