Question

Will fan and medal!
Consider the functions f(x) = 2x + 1 and g(x) = x2 − 10. What is the value of f[g(3)]?

39
−3
−7
−1

Answer 1

Ok, what do you think we do first?

Answer 2

Um do you have to replace x with something?

Answer 3

Yes, but look at the f and g for a second
f[g(3)]?

How do you think it will look in a equation?

Answer 4

2x+1[x^2-10](3)]

Answer 5

When an equation is like this f(3) what do we do with the 3?

Answer 6

times is by 3?

Answer 7

it*

Answer 8

to what ? x's or y's

Answer 9

x?

Answer 10

correct, so look at this again f[g(3)]?

Answer 11

so would it be 2x+1 times 3?

Answer 12

Nope, you have to plug it in to the g or f ?

Answer 13

f

Answer 14

try again

Answer 15

g?

Answer 16

Correct, how will it look

Answer 17

I'm really not sure, (x^2-10)^3?

Answer 18

Ok it is saying with plug G for f and with G plug 3 for x so it will look like

2(3^2-10)+1

Answer 19

ooooh okay!

Answer 20

I dont know whats next

Answer 21

do you know order of operations?

Answer 22

perform operations in grouping symbols first....
then do the exponents
then do the multiplication/division as it occurs left to right
then do the addition/subtraction as it occurs left to right

Answer 23

im still confused i dont know where to start :/

Answer 24

do you see the ( )?
these are grouping symbols

Answer 25

perform the operations inside the ( ) first

Answer 26

you should see exponent and subtraction

Answer 27

do the exponent then do the subtraction inside the ( )

Answer 28

3^2 just means you have 2 factors of 3
3*3=?

Answer 29

so 2(9-10)+1

Answer 30

right

Answer 31

Sorry i am really busy D: Freakles can help better than me

Answer 32

I don't believe that @jagr2713


can you continue now?
@Hahawowoh
2(9-10)+1 is right so far

Answer 33

oops I didn't mean about the busy part
I meant the better part lol

Answer 34

lol

Answer 35

2(9-10)+1
are you having trouble with 9-10?

Answer 36

-1

Answer 37

Thanks, freckles for taking over :D