Answer:
Answer: B) initial height = 150; hits the ground between 5 and 6 seconds
The standard form: Ax + By = C
3x - y = -6 YES - A = 3, B = -1, C = -6
3x + y = 6 YES - A = 3, B = 1, C = 6
x + 6y = 9 YES - A = 1, B = 6, C = 9
x - 6y = -9 YES - A = 1, B = -6, C = -9
It would come out to be $41.8275, so if you round it would cost $41.83.
5 more than a square number would be 21 which is 5 more than 16 (the square of 4)
Hope this helps!! I just distributed when needed and solved for the unknown variable