OpenStudy (anonymous):

4. If f(x) = 4x + 1 and g(x) = −x − 2, find (f + g)(−1).

4 years ago
OpenStudy (anonymous):

What (f+g)(-1) means is to add up the two binomials first f(x)+g(x), and then substitute -1 for x. What do you get when you do: 4x+1-x-2

4 years ago
OpenStudy (anonymous):

5x=3???

4 years ago
OpenStudy (anonymous):

There's no = sign, just simplify it by adding like terms: First do 4x-x, and then 1-2

4 years ago
OpenStudy (anonymous):

3x -1?

4 years ago
OpenStudy (anonymous):

@zaynahf

4 years ago
OpenStudy (anonymous):

Good.. now just substitute -1 for x

4 years ago
OpenStudy (anonymous):

so it's going to be -1x or -3x

4 years ago
OpenStudy (anonymous):

No, because you are substituting something for x, there will be no more x. Do this: 3(-1)-1

4 years ago
OpenStudy (anonymous):

-4!!

4 years ago
OpenStudy (anonymous):

Yep! You got it!

4 years ago
OpenStudy (anonymous):

thank you please come to my next post!

4 years ago
OpenStudy (anonymous):

Sure..

4 years ago