The quotient of 18 and 3 as a numerical expression

When the ball has traveled a distance of

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.