I need help please show your work please

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

Average acceleration: i have no idea how to do this.

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)