Question

Someone Please Help!

Given f(x) = the quantity of x plus 4, divided by 6, solve for f-1(7)

Answer 1

is f(x)=x+4/6 ???

Answer 2

Yes that's it

Answer 3

I don't know what to do

Answer 4

ok put f(x)=y

Answer 5

And then what?

Answer 6

now solve x+4/6=y for the value of x...

Answer 7

So x = 6y/4?

Answer 8

nope x=6y-4

Answer 9

do carefully

Answer 10

Oh that's right, I missed that. I get it though. So what's next?

Answer 11

as we assumed that
f(x)=y it implies x=f^-1(y)

put f^-1(y)=6y-4

Answer 12

Ok

Answer 13

Wait so I just put 7 in for 7 and solve? So the answer is 38?

Answer 14

7 in for y*

Answer 15

now replace the variables i.e y by x (REMEMBER the change of the name of the variable in def. of fun does not change that fun)

Answer 16

I got 38.

Answer 17

yup thatz right

Answer 18

:D Okay thanks so much!

Answer 19

I might have another question.

Answer 20

yup

Answer 21

Using a directrix of y = 5 and a focus of (4, 1), what quadratic function is created?

I need help with this one

Answer 22

sorry its related to conic section...& i don't have any idea about this....SORRY :(

Answer 23

What about this question

What polynomial has roots of -6, -4, and 1?

Answer 24

no idea...ask to other people they will surely help...