I dont understand what to do here, can somebody help, please? 4.2 / 6 = tenths / 6 4.2 / 6 tenths

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.

Write the expression 7x^3-28xy^2 as the product of 3 factors

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12