I just need to see if I am correct for the first two but I need help on the last please and thank you ASAP!!
1 st one Correct
2 nd one It is the third graph down....Do you know why?
the parabola will be upside down due to the -3/4 leading coefficint
then sub in some values of x to find which one fits the other g(x)
answer 0 and 2 I think you may have gotten confused and put in the 'y' values
....the questin asks for the 'x' values where f(x) = g(x)
Equate the two functions (when the two balls are equal height) and solve for x (this is the TIME ...not the height)
-4.9x^2 + 12x + 2.5 = -4.9x^2 + 14 x
12x + 2.5 = 14x
2x = 2.5
x = 2.5/2 = 1.25 seconds is the TIME
substitute this value of time into one of the equations to find the HEIGHT
I would substitute into the OTHER equation to see if the answer is the same ....as a check of your answer !