Question

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

Answer 1

the answers are
−4

4

−32

8

Answer 2

f(x) = x2 − 13
do you mean
f(x) = x^2 − 13

Answer 3

yes .

Answer 4

if so then
(x^2 − 13) + ( x + 5)
x^2+x-8 add like terms

3^2+3-8 plug in 3 where there are xs

=4

Answer 5

can you help me with this one : Consider the functions f(x) = 13x2 and g(x) = 7x − 5. What is the value of (f − g)(3)?

Answer 6

@timo86m

Answer 7

subtract the 2 functions and plug in 3
13*x^2-7*x+5

101

Answer 8

I know this is alot but could you help me with this one to ? Consider the functions f(x) = 8x + 2 and g(x) = 5x − 3. What is the value of ( )(4)? Please show all of your work for full credit.

Answer 9

of ( )(4)
^ ?

Answer 10

f[g(−4)]?

Answer 11

f[g(−4)] if this is right and you sure it is that then
ooh you plug in the whole 5x- 3 into 8x+2 in the x

so

8*(5x- 3)+2
40*x-22 distribute the 8 into 5x and - 3 then add the +2

Plug in - 4
-182

Answer 12

woops, its f/g @timo86m

Answer 13

f(x) = 8x + 2 and g(x) = 5x − 3 (-4)
(8x+2) / (5x-3) just divide then
(8(-4)+2)/(5(-4)-3) plug in the -4 where the xs are at

30/23