contestada


A phone company offers two monthly plans. Plan A costs
$11
plus an additional
$0.12
for each minute of calls. Plan B costs
$28
plus an additional
$0.07
for each minute of calls.
What is the cost when the two plans cost the same

Respuesta :

nanypla
Set up equations.

Y=.12(X)+11
Y=.07(X)+28

Set equations equal to each other and solve

.12(X)+11 = .07(X)+28

.05(X) = 17
17/.05

X = 340

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