Question

Express y as a function of x. The constant C is a positive number.
y= In 4x + In C

(a) y = 4Cx
(b) y = 4x + C
(c) y = (4x)^C
(d) y = x + 4C

Need a walk through plz! :)

Answer 1

y is a function of x, you have a typo

Answer 2

can you take a screenshot of your worksheet

Answer 3

y IS a function of x , dude

Answer 4

good luck

Answer 5

no, you didnt copy it correctly

Answer 6

none of your solutions have ln x in it, notice that?

Answer 7

i have a math degree

Answer 8

how do you know im not in college? lol

Answer 9

you better delete that

Answer 10

check your parenthesees or something. the answers dont match the question

Answer 11

am i?

Answer 12

if y= In 4x + In C y does not equal 4cX

Answer 13

well we can get a second opinion if you dont trust me

Answer 14

ok bump it

Answer 15

you can graph it if you like

Answer 16

ln just doesnt disappear

Answer 17

What @perl means is that y is already a function of x.

If y appears alone on one side of the equation, with x on the other side, then y is a function of x.

:)

Answer 18

terenz , his answers dont match the question.

Answer 19

e.coiuba lets move on. why live in the past

Answer 20

Oh... right, are you sure there are no logarithms (ln) in your choices, @e.cociuba ?

Answer 21

i already posted the solution, but ill do it again -sighs heavily-
y= In 4x + In C = ln (4xC) , there we are done

Answer 22

i did leave already, but i keep getting notifications

Answer 23

im not sure how to unnotify myself

Answer 24

My fault... @perl
I'm going to stay out of this, until further notice or instruction...

Answer 25

terenz, wait

Answer 26

terenz, we need your second opinion

Answer 27

Okay... @e.cociuba
You're not going to love this... (probably) but I agree with @perl at almost every point~
y already is expressed as a function of x
and ln does not simply disappear...

So, if I must have a different opinion... I'm wondering (wildly)... could there have been an expression \(\large e^y\) by any chance?

Answer 28

Well, trust @perl
The answers are quite accurate and well-explained :)

Answer 29

so we are using log rules here
ln (x ) + ln(y) = ln ( x*y)
in this case we have
ln(4x) + ln (C) = ln ( 4x*C)

Answer 30

None of the answer choices YOU posted are correct. But if there was in fact, a "ln" preceding every choice, then yes, a.) would be correct.

Answer 31

Looking at it right now, methinks :)

Answer 32

Ok nvm boys. Thanks for yalls for ur help :)

Answer 33

So many deleted comments o.O
No problem @e.cociuba