12= 1/2z what’s is the awnser

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.

Which value would be a solution for x in the inequality 47-4x< 7

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?