Solve 9 through 20 or just solve one so you can give me an example

Does anyone know of a quizlet or something for edmentrum /plato algebra 1

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.

Can someone check if i did this correct. it’s number 4 if you’re wondering.