HELP PLEASE IM TIMED I MADE THIS WORTH 20 POINTS!

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

These question are hard can you me with answers

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.