# 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.

Algebra foundations
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.

a) Let x be the number of hours. The total charge is $50, plus$30/h times the number of hours:
$$\displaystyle{50}+{30}{x}$$
$$\displaystyle{50}+{30}{\left({2.5}\right)}={50}+{75}={125}$$