Please help!! Finding missing angles

Explain how you do each step 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.

Find the rate at which the water is now flowing from the tap give your answer cubic centimetres per second