Evaluate each expression for a= -2, b = -4.1, and c=5. 1) a - b + c

2) -c + b - a

3) -a + ( -c)

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.