Question

f(x) = 4x + 7, g(x) = 3x2
Find (f + g)(x).
A. 3x2 + 4x + 7
B. -3x2 + 4x + 7
C. Quantity four x plus 7 divided by three x squared.
D. 12x3 + 21x

Answer 1

@zepdrix

Answer 2

@pooja195

Answer 3

@jim_thompson5910

Answer 4

(f+g)(x) is the same as f(x) + g(x)

Answer 5

so you just add the two right sides of the functions

Answer 6

Then arrange the terms

Answer 7

...A? I'm not sure.. I am horrible at math.

Answer 8

Correct

Answer 9

really??

Answer 10

\[\Large {\color{red}{f(x) = 4x+7}}\]
\[\Large {\color{blue}{g(x) = 3x^2}}\]
------------------------------------------
\[\Large (f+g)(x) = f(x) + g(x)\]
\[\Large (f+g)(x) = {\color{red}{f(x)}} + {\color{blue}{g(x)}}\]
\[\Large (f+g)(x) = {\color{red}{4x+7}} + {\color{blue}{3x^2}}\]
\[\Large (f+g)(x) = {\color{blue}{3x^2}}+{\color{red}{4x+7}}\]
\[\Large (f+g)(x) = 3x^2+4x+7\]

Answer 11

thank you so much!

Answer 12

no problem