Two supplementary angles when added together need to equal 180 degrees. Let the first angle = X The second angle would then be X - 152 Add them together to equal 180: X + X - 152 = 180 Simplify: 2X -152 = 180 Add 152 to each side: 2X = 332 Divide both sides by 2: X = 332 / 2 X = 166 The first angle = X = 166 degrees. The second angle = X - 152 = 166 - 152 = 14 degrees. The angles are 166 and 14
H=0 Therefore: 144t-16t²=0 t (144-16t)=0 We have two equations: 1) t=0 (when the ball is released) 2) 144-16t=0 -16t=-144 t=-144 / -16=9 (this is the time )