PLease help me on 57 - 63

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x

On her first stroke, maya hit a golf ball 146 yards, 2 feet, 11 inches. on her second stroke, she hit it 163 yards, 1 foot, 2 inches. how far did the ball go all together? convert the answer to larger units whenever possible.

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?