Evaluate for a= 1.2 and b=4

i need it now

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

What is the value of x in the following equation? -3x-2=2x+8

Combine the information in the problem and the chart using the average balance method to solve the problem.