Dan's long-distance phone carrier charges him $3.95 a month for service. In addition, Dan is charged 5 cents a minute for the calls he makes. If his monthly bill is $48.50, how many minutes of calls did he make?

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Answer 1 · 2016-11-11T15:08:57

Dan made 891 minutes of calls.

The formula for the cost of Dan's phone can be written as:

#c = $3.95 + ($0.05 xx m)# where #c# is the total cost and #m# is the minutes of calls he made.

Because we know #c# we can update this equation to:

#$48.50 = $3.95 + ($0.05 xx m)#

Solving for #m# while keeping the equation balanced gives:

#$48.50 - $3.95 = $0.05 xx m#

#$44.55 = $0.05 xx m#

#($44.55)/($0.05) = ($0.05 xx m)/($0.05)#

#m = 891#