Homework : all of the following expressions are equivalent except
a) 2 - x
b) x - 2
c)-2 + x
d)x + (-2)

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.