A computer repair technician charges $50 per visit plus $30/h for house calls. a) Write an algebraic expression that describes the service charge for one household visit. b) Use your expression to find the total service charge for a 2.5-h repair job.

Question
Algebra foundations
asked 2021-01-02
A computer repair technician charges $50 per visit plus $30/h for house calls.
a) Write an algebraic expression that describes the service charge for one household visit.
b) Use your expression to find the total service charge for a 2.5-h repair job.

Answers (1)

2021-01-03
a) Let x be the number of hours. The total charge is $50, plus $30/h times the number of hours:
\(\displaystyle{50}+{30}{x}\)
b)Substitute x=2.5 to the expression in part a:
\(\displaystyle{50}+{30}{\left({2.5}\right)}={50}+{75}={125}\)
So, the total service charge is $125.
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