College Algebra

Solve the system by the substitution method. xty = -3 y = - 2x You throw a ball straight up from a rooftop. x, seconds after y, ball's height, in N The ball misses the rooftop on its way down the ball is feet, above the and eventually strikes the ground. A thrown ground mathematical model can be used to describe 329 the relationship for the ball's height above the 291 ground, y, after x seconds. 224 a. Find the quadratic function y = ax + bx + c whose graph passes through the given points. y= b. Use the function in part (a) to find the value for y when x = 5. When x = 5, y =. 3 Use a graphing utility to graph the two equations in the system in the same viewing rectangle. Then use the intersection feature to determine the solutions. y = 3x +5 x 2 +2 = 5