Two cars leave town at the same time in opposite directions. the average rate of speed of one car is 15 miles per hour faster than the average rate of speed of the other car. the cars are 375 miles apart after 3 hours find the average weight of speed of the two cars.

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.