Question

The table below shows some values of f(x) and g(x) for different values of x:

determine the solution of the equation f(x) = g(x)
x = -2
x = -1
x = 1
x = 4

Answer 1

For each value of x, plug it in to f(x) and g(x). What do you get for x=1? x=-1?

Answer 2

i dont get it at all :( do i base it off when they both equal 1?
@BTaylor

Answer 3

no. let's look at f(x). f(x) is given as 3x+7. When x=1, f(x) = 3(1) + 7 = 10.
for g(x) = 4^(-x), when x=1, g(x) = 4^(-1) = 1/4. So those aren't equal.
Can you do the same for x=-1?

Answer 4

fx= 4
g(x)=4 or -4?

Answer 5

Good job. g(x) = 4, since \(4^{-(-1)}=4\)

Answer 6

thanks for the help! i have one more that i need help with, could i open a new question and get help with that one?

Answer 7

oh another question is the awnser 4 or -1?

Answer 8

the solution is x=-1, not x=4, since you are looking for the x-valule.

Answer 9

alright thank :)