How do you simplify 9×(7-4)^2+9 explain step by step

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual