Question

Medal and fan awarded :)))

Given the following functions f(x) and g(x), solve (f + g)(3) and select the correct answer below:

f(x) = 2x + 21

g(x) = x − 24

−27
−21
6
48

Answer 1

@Mehek14

Answer 2

first add f(x) and g(x)

Answer 3

How do I add f(x) and g(x)? This is a brand new topic to me, lol

Answer 4

add like terms
2x + 21 + x - 24

Answer 5

- simple algebra

Answer 6

3 x - 3

Answer 7

right now all you need do is plug in x = 3 and work it out

Answer 8

f(3) g(3)?

Answer 9

3(3) - 3 = ?

Answer 10

6

Answer 11

right! thats it

Answer 12

(f + g)(3) = 6

Answer 13

So how do I work that out

Answer 14

- you've worked it out
3(3) - 3 = 6

Answer 15

(f + g)(3) means the sum of f(x) and g(x) when x = 3

Answer 16

So the answer's 6?

Answer 17

yes

Answer 18

Great :D

Answer 19

yw

Answer 20

Could you help me with a few more?

Answer 21

well i've only got 5 minutes...

Answer 22

ok i could help with 1 more

Answer 23

Great :)

Answer 24

Dishwashers are on sale for 25% off the original price (d), which can be expressed with the function p(d) = 0.75d. Local taxes are an additional 14% of the discounted price, which can be expressed with the function c(p) = 1.14p. Using this information, which of the following represents the final price of a dishwasher with the discount and taxes applied?

c(p) ⋅ p(d) = 0.855pd
c(p) + p(d) = 1.89d
c[p(d)] = 0.855d
d[c(p)] = 1.89p

Answer 25

0.75d - 0.14*0.75d

Answer 26

0.645?

Answer 27

or is it .14

Answer 28

- sorry gotta go right now

Answer 29

Darn :(

Answer 30

I havent got this clear in my mind yet

Answer 31

Thanks for the help :/