Is x+y is an algebraic expression?

Chose the graph below that represents the following system of inequality’s

What term makes it inconsistent y=2x - 4

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.