[SOLVED] Eliminating the parameter, physics equation. The question reads "The quarterback of a football team releases a pass at a height of 7 feet above the playing field, and the football is caught by a receiver at a height of 4 feet, 30 yards directly downfield. The pass is released at an angle of 35 degrees with the horizontal. Find the speed of the football when it's released. I'm given x = (vi*cosθ)t and y = h + (vi*sinθ)t - 16t^2 as my parameters. I need a pointer in the right direction. I attempted to equate it to cos 35 and sin 35, but I wasn't sure how to solve vi from there. Thank you for your help.