M/18=24/15
how do i do this problem?

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.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

What is the scale factor of two similar pyramids with volumes of 64 cubic feet and 8 cubic feet