In Out
5 2
6 4
7 6
8 8
9 10
10 12
11 14
The table shows x-values going in and y-values coming out. The function being used is
A)
f(x) = 2x
B)
f(x) = x - 3
C)
f(x) = x - 8
D)
f(x) = 2x - 8

- anonymous

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- misty1212

HI!!

- misty1212

it is not \(f(x)=2x\) since that would make \(f(5)=10\) but \(f(5)=2\)

- misty1212

it is not \(f(x) = x - 3 \) since that would make \(f(6)=6-3=3\) but \(f(6)=4\)

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## More answers

- anonymous

Alright So now A. isnt right

- misty1212

and it sure as hell is not \(f(x)=x-8\) since you are not subtracting 8 from the first number to get the second

- anonymous

nor B right?

- anonymous

Ok so then then D?

- misty1212

nope
not A
not B
not C

- misty1212

gotta be D
you can check to see that if you double the first number, then subtract 8 from the result, you get the second number

- anonymous

Thank you so much!

- anonymous

Could you help with just 2 more?

- misty1212

\[\color\magenta\heartsuit\]

- misty1212

sure why not?

- misty1212

i charge $10 an answer, $20 for correct ones

- anonymous

Sounds good

- misty1212

just kidding...

- anonymous

Solve the system.
5/8x -2/3y = -3
3/4x + 1/2y = -4
A. (9, 10)
B. (9/2, 5)
C. (16, -39/2)
D. (-56/9, 4/3)

- misty1212

lol this is donkey work, let the computer do it

- anonymous

I know its not A and ok take your time

- misty1212

here i will show you how

- misty1212

hmm is there a typo there? none of those answers are correct

- anonymous

Ill show you a picture

- misty1212

\[\frac{5}{8}x-\frac{2}{3}y=-3\\
\frac{3}{4}x+\frac{1}{2}y=-4\]

- misty1212

that is what i read but none of the answer choices are right
yeah post a picture

- anonymous

##### 1 Attachment

- misty1212

hmm that is what you wrote too, but none of those choices are correct !

- anonymous

Hm idk why? well let me move on to another question (:

- misty1212

hold on a sec, let me try something

- misty1212

here is the right answer
http://www.wolframalpha.com/input/?i=5x%2F8-2y%2F3+%3D+-3%2C3x%2F4+%2B+y%2F2+%3D+-4+

- anonymous

##### 1 Attachment

- anonymous

Ok its fine!

- misty1212

most of the answers to the last one don't even make logical sense, but the answer you are looking for is D
an exponential function with a base bigger than one will eventually exceed any polynomial function

- anonymous

Thanks so much!

- misty1212

sorry about the middle one, i think they made a mistake

- misty1212

\[\color\magenta\heartsuit\]

- anonymous

Its fine (:

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