Can someone please help me with this

Solve the system of equations. y= 2x y= x^2 - 15

Ataxi company charges $2.25 for the first mile and then $0.20 per mile for each additional mile, or f = $2.25 + $0.20(m - 1) where f is the fare and m is the number of miles. if juan's taxi fare was $6.05, how many miles did he travel in the taxi? if juan's taxi fare was 7.65, how many miles did he travel in taxi

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