Yall please help i can't

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 statement is true? 2x^2-9x+2=-1

Find the value of x. give reasons to justify your solutions! l, m ∈ kn