5 > −2 3x + 5 = 2 61 = 61 < −6 −6 9-54. Robbie builds model rockets. One day he sets up a rocket, backs away from the launch pad, and then shoots the rocket off into the air. represented by the The rocket’s path is equation = + 130x 400, where is the height in meters off the ground and is the y y x −10x2 − horizontal distance in meters from Robbie. Use either the Zero Product Property or the Quadratic Formula to find the of x-intercepts the path of Robbie's rocket. What do the tell you? x-intercepts When Robbie's rocket lands, how far is it from the launch pad? 9-55. For each parabola graphed below, visually estimate the Then use the x-intercepts. Quadratic Formula to confirm your estimates. = 5x + 3 y x2 − = + 2x 6 y x2 −
5 > −2 3x + 5 = 2 61 = 61 −6 < −6 9-54. Robbie builds model rockets. One day he sets up a rocket, backs away from the launch pad, and then shoots the rocket off into the air. The rocket’s path is represented by the equation y = −10x2 + 130x − 400, where y is the height in meters off the ground and x is the horizontal distance in meters from Robbie. Use either the Zero Product Property or the Quadratic Formula to find the x-intercepts of the path of Robbie's rocket. What do the x-intercepts tell you? When Robbie's rocket lands, how far is it from the launch pad? 9-55. For each parabola graphed below, visually estimate the x-intercepts. Then use the Quadratic Formula to confirm your estimates. y = x2 − 5x + 3 y = x2 + 2x − 6
9.2.1%20Alg%20HW.docx