Expand & simplify:
(x - 1 )(x - 1)

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.

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

Hello, i need compare km^2 and km. what's difference in this?