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## anonymous 3 years ago need help!!! Medalss!!!

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1. anonymous

simplify -1/5 - 2/3

2. anonymous

all you would do is get a caculator and type in -1/5 - 2/3 and you will get your answer..

3. anonymous

alrite hang on tell me if you get the same thing

4. anonymous

okkayy.. lol

5. anonymous

-0.86666666666666666666666666666667

6. anonymous

lol

7. anonymous

did you get the same thing

8. anonymous

yes i did.. lol

9. anonymous

but I dont thinks thats right

10. anonymous

It is -0.86 you take the rest of the numbers off.. lol

11. anonymous

oh how would I put that in a fraction tho :)

12. anonymous

you would take -0.86 and divide that by 100 and then tell me what you get ?!

13. anonymous

0.0086

14. anonymous

i just did it and i got 0.0086

15. anonymous

so when does it become a fraction

16. anonymous

then take that and put 86 over 100 and that's your answer (:

17. anonymous

is it right?

18. anonymous

umm idk because my cousin got $-\frac{ 13 }{ 15 }$

19. anonymous

hmmmm... not sure then sorry

20. anonymous

its okay thnx for trying

21. anonymous

your welcome (:

22. anonymous

wbu tomo do you know how to do this problem

23. anonymous

Find the greatest common denominator and simplify

24. anonymous

-1/5 - 2/3 multiply the first term by 3/3. you need a common denominator to add or subtract fractions. in this case the least common denominator is 15 (-1/5)*(3/3) = -3/15 multiply the second term by 5/5 (2/3)*(5/5) = 10/15 $\frac{-3}{15}-\frac{10}{15} = \frac{-3-10}{15} = \frac{-13}{15}$

25. anonymous

alright hb $\frac{ 8k-12h }{ 4 }$

26. anonymous

pull out a 4 out of the numerator.

27. anonymous

-4kh

28. anonymous

??

29. anonymous

8-12 is - 4?

30. anonymous

oh nvm its 2k-3h

31. anonymous

good catch.

32. anonymous

duuhh immma dork sometimes

33. anonymous

now you have $\frac{4*(2k-3h)}{4} = \frac{4}{4}*(2k-3h) = ?$

34. anonymous

1kh

35. anonymous

k and h are not multiplied they are being subtracted so you have (4/4)(2k-3h) 1*(2k-3h) (2k-3h) you cannot simplify further 2k-3h does not equal 1kh suppose you have k = 2, h = 3 2k-3h = 2*2-3*3 = 4-9 = -5 1kh = 1*2*3 = 6 // clearly not -5

36. anonymous

okay I have no idea how to solve this one "a bowl contains 4 red chips, 3 blue chips, and 9 green chips. your choose one a random" Find P (not red) now how would I solve this?

37. anonymous

P(not x) = 1-P(x)

38. anonymous

wait how did you figure that

39. anonymous

you have a total probability of 1. therefore the P(x) is something then the probability of not x is 1 minus the probability of that something.

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