In a survey of year 6 pupils, 25% said their favourite colour was red. if 16 pupils said red, how many pupils are there in year 6?

For which pair of functions is (gof)(a)=|a|-2?

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.

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2