4.Solve the equation: 2q(q+9)^2 (6q-5)=0

My answer: q = 0, 9, 5/6

5. Translate from English form to Algebraic form: The square of the difference of 2x plus y and 8.

My answer: (2x+y)^2 + 8.The other answers areA.((2x + y) - 8)^2C.(2x + y)^2 + 8²and

D.8^2 - (2x + y)

5.Completely factor the expression, if possible: r^2 - 2r+1

My answer: (r-1)(r-1)

6.A bus driver follows a morning route and an afternoon route each day. Because there are more cities on the morning route, the average speed is 12 miles per hour less than the afternoon route. The driver covers 70 miles on the morning route in the same amount of time as she covers 100 miles on the afternoon route. Find her average speed on the afternoon route.

My answer: 40 miles per hour (I am pretty confident in this one. However, I would still like to make sure it is right)

7.Find the product of (x-2y)^2

My answer: x^2 - 4xy + 4y^2

8.Simplify the expression: (u-1)(u-4)(u-5)

My answer: u^3-21u+20

For the most part, I just want to make sure that my answers are correct. I was allowed to use an algebraic calculator. I DID use this calculator for most of these questions! HOWEVER, I would like if the tutor could show (if the answers are correct, and if they're not) how the answer was achieved. I can't go using a calculator or easy solution for everything in life. THANK YOU to whomever helps!!