Question

Consider the functions f(x) = x2 − 13 and g(x) = x + 5. What is the value of (f + g)(3)?

Answer 1

@ivettef365

Answer 2

ok you can add both functions first and then substitute the x for 3
or you can substitute on both functions the x for 3 and then add the results

Answer 3

Question is quite simple since both are functions of x then (f+g)(x)=f(x)+g(x)
so (f+g)(x)=2x-13+x+5
(f+g)(x)=3x-8
(f+g)(3)=3x3-8=9-8=1

Answer 4

ipm sorry but that is wrong because is no 2x, it is x^2

Answer 5

ya 1 is not an answer

Answer 6

so you have x^2 -13 +x +5

Answer 7

that is equal to

x^2 +x -8 now substitute the x for 3 and what do you get

Answer 8

@ivettef365 not my fault in the question it was not given raised to the power

Answer 9

sorry

Answer 10

so what are the equations

Answer 11

-32?

Answer 12

its x^2

Answer 13

@ivettef365

Answer 14

you are talking about f(x) right

Answer 15

no the x right after that

Answer 16

ok the problems are:


f(x) = x^2 -13 and g(x) = x +5

Answer 17

yes

Answer 18

ok, then it was correct all alone, so we have

x^2 +x-8, substitute x for 3 what do you get

Answer 19

-4?

Answer 20

actually positive 4

Answer 21

you have

(3)^2 +(3) - 8

9 +3 -8 = ??

Answer 22

4 becuz the 12 is bigger

Answer 23

correct

Answer 24

yes! ty

Answer 25

yw :)