What is the answer for 5x-3(4x-8)=-11

Ihave trouble finding the nth term of a linear sequence

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that