Question

If
f(x) = x2 + 8x − 3,
what is
f(5)?

Answer 1

So here you would just put instead of x a 5

Answer 2

so 5*2+8*2-3

Answer 3

23

Answer 4

Wow your smart. ;)

Answer 5

are you being sarcastic because i just put it in and it says its wrong

Answer 6

No I got 23 as well...

Answer 7

You sure?

Answer 8

oooh you forgot x^2

Answer 9

so its 5^2+8*5-3

Answer 10

its 62

Answer 11

Let
f(x) = 7x − 25.
What ordered pair in f corresponds to the equation
f(x) = 3?
Recall
y = f(x).

(x, y) =

Answer 12

so same thing. to find x

Answer 13

instead of x you have 3

Answer 14

and f(x) is just a fancy way of saying y.

Answer 15

So its 7*3-25

Answer 16

-4

Answer 17

mhm

Answer 18

Alright emmy igtg look at my question... ttyl.

Answer 19

:)

Answer 20

Substitute the value of y into the equation that defines f. Did you solve that equation for x? Remember that when writing an ordered pair, the x-coordinate comes first and the y-coordinate comes second.

Answer 21

thats what it says

Answer 22

I solved for y because all f(x) means is y

Answer 23

f(x) = y