## anonymous one year ago 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

1. misty1212

HI!!

2. misty1212

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

3. misty1212

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

4. anonymous

Alright So now A. isnt right

5. 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

6. anonymous

nor B right?

7. anonymous

Ok so then then D?

8. misty1212

nope not A not B not C

9. 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

10. anonymous

Thank you so much!

11. anonymous

Could you help with just 2 more?

12. misty1212

$\color\magenta\heartsuit$

13. misty1212

sure why not?

14. misty1212

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

15. anonymous

Sounds good

16. misty1212

just kidding...

17. 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)

18. misty1212

lol this is donkey work, let the computer do it

19. anonymous

I know its not A and ok take your time

20. misty1212

here i will show you how

21. misty1212

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

22. anonymous

Ill show you a picture

23. misty1212

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

24. misty1212

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

25. anonymous

26. misty1212

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

27. anonymous

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

28. misty1212

hold on a sec, let me try something

29. 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+

30. anonymous

31. anonymous

Ok its fine!

32. 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

33. anonymous

Thanks so much!

34. misty1212

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

35. misty1212

$\color\magenta\heartsuit$

36. anonymous

Its fine (: