+0

# 1:What is the solution to f(x)=g(x) ?2:What is the solution to f(x)=g(x) ?3:What is this height?

0
92
2   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!!

Jan 10, 2020

#1
+2

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)

Jan 10, 2020
#2
+2

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 ! Jan 10, 2020