Runs at a speed at 3 yards per second how many miles per second does he run

Which point is a solution to y s 4x + 5?

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.

Which expression is the factorization of x^2+10+21