Acontractor finds that 7 gallons of paint will cover 1575 sq ft of wall area. how much wall area could be covered with 21 gallons of paint?

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

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x