Question

Given the parent functions f(x) = 3x + 2 and g(x) = 5x − 10, what is g(x) − f(x)?

Answer 1

The x after the 5 is small and looks like an exponent.

Answer 2

the 2nd choice is correct.

g(x)-f(x)= 5x-10-(3x+2)
=5x-10-3x-2
=5x-10-2-3x
=5x-12-3x

Hope this helps!

Answer 3

Ok, thanks:) Can you help me with one more, please?

Answer 4

yes i will try

Answer 5

Ok, thanks!
If f(x) = log2 (x + 4), what is f−1(3)?


*The 2 after log is small and lower than the log. The -1 small and to the top of f, like an exponent.

Answer 6

3=log2x+4
solve for x
"Inverse" may mean reciprocal, as so x^-1 = 1/x

but it may mean going from ln x to exp(x), for example.

Something is wrong, as none of your options correspond to my thought.

Answer 7

Oh,sorry, I didn't give any options. These are them:
0

2

4

8

Answer 8

Another, more roundabout, approach would be to actually find the inverse of y = base2log (x+4):
a) replace f(x) with y
b) interchange x and y (replace x with y and y with x)
c) solve the resulting equation for y
d) replace this y with

-1
f (x)
-1
e) The result is f (x) = 2^x -4..
f) evaluate this at x=3.

Answer 9

I'm confused, so which answer would that be?

Answer 10

give me a min

Answer 11

ok:)

Answer 12

Wait, could it be 4? Substituting 3 for x? Idk

Answer 13

i believe that it is 4 but it could be 2

Answer 14

Well how did you solve it?

Answer 15

i knew the answer to the first one but the 2nd one i used google for

Answer 16

i would say 4 as the answer