Question

Help please? Need second opinion!

Answer 1

post question

Answer 2

@alyssa_xo

Answer 3

what answers have you got

Answer 4

it's not graphing lol, that's just a screenshot I overrided

Answer 5

1: 7x+4
2: -3x+4
3: 240

Answer 6

he medaled me...... Does that mean They're right?

Answer 7

I think it means he doesn't know

Answer 8

on the plus side, I know, but I was the first opinion so I have no say here

Answer 9

lol but you can stick around to see if you were righhhttt

Answer 10

I medalled because I agree

Answer 11

oh ok. I had a bad feeling. I'm ridding on this test so If I fail >.> badddd things happen.. like... a bad grade...

Answer 12

riding* Thank you! If anyone else agrees just let me know, or if you disagree MUCH APPRECIATED!!!

Answer 13

actually i don't know about (f.g)(4)

Answer 14

@e.mccormick

Answer 15

that's mainly the one I'm not sure about either

Answer 16

@Nnesha

Answer 17

Pretty sure #3 is 164

Answer 18

show your work pls

Answer 19

^

Answer 20

Nnesha you agree with dagrothus?

Answer 21

(f*g)(4) is f compose of g so put the function g into f,
f*g = 10x^2+4
(f*g)(4) = 10*(4^2) + 4= 10*16+4 = 160+4+164

Answer 22

is that f compose? I thought it was f times g

Answer 23

the compose looks like an o

Answer 24

it is.

Answer 25

oh, my answer was wrong, yeah

Answer 26

I don't understand how you did it through dagro

Answer 27

Yeah compose should look like an "o", so i'm not entirely sure if that's supposed to be f compose of g or f times g

Answer 28

I replaced the x in the f(x) equation with the function g(x)

Answer 29

its just f*g because when I did similar problems I answered it like that. I know it isn't like that by that much.

Answer 30

This is from aleks

Answer 31

its ( f times g)
not (f o g)

Answer 32

this notation sucks lol

Answer 33

oh I see why he thought it was f o g. No i know how to do those, I know what you mean.

Answer 34

^ yeah lol

Answer 35

why is compose even a thing? just write f(g(x))

Answer 36

I'm surprised I even remember that notation haha

Answer 37

i didn't learn it as f o g. I learned it as f(g(x)) like you said

Answer 38

do you agree it is 240?

Answer 39

we said it was 240 right? alyssa

Answer 40

for ( fog)
first you have to substitute 4 into g(x)
and then g(x) value into f(x)

Answer 41

yes it's 240

Answer 42

okay thank you. basically fog is the substitution method

Answer 43

when you're looking for x and y

Answer 44

@Nnesha yeah you can do the substitution either way since multiplication is communative

Answer 45

commutative*

Answer 46

yep sub
but i'm saying (f times g) is diff thn (fog)..

Answer 47

substitution =sub

Answer 48

yeah, we already agreed on that

Answer 49

yeah you're right, the original question was supposed to be f times g

Answer 50

thank you guys. Im gonna close the question