½[cos 2 X cosx/2 - 2 cos9x/2-3sin5x/2]

Which statement best describes the polynomial

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.

Solve the system of equations y= 3/2 - 1, -x+ y =-3