Factor each completely?
a2-7a-18

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.

Simplify the expression. -2/5(10+15m-20n)

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?