need help!!! Medalss!!!

- anonymous

need help!!! Medalss!!!

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- anonymous

simplify
-1/5 - 2/3

- anonymous

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

- anonymous

alrite hang on tell me if you get the same thing

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## More answers

- anonymous

okkayy.. lol

- anonymous

-0.86666666666666666666666666666667

- anonymous

lol

- anonymous

did you get the same thing

- anonymous

yes i did.. lol

- anonymous

but I dont thinks thats right

- anonymous

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

- anonymous

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

- anonymous

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

- anonymous

0.0086

- anonymous

i just did it and i got 0.0086

- anonymous

so when does it become a fraction

- anonymous

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

- anonymous

is it right?

- anonymous

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

- anonymous

hmmmm... not sure then sorry

- anonymous

its okay thnx for trying

- anonymous

your welcome (:

- anonymous

wbu tomo do you know how to do this problem

- anonymous

Find the greatest common denominator and simplify

- 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
\[\frac{-3}{15}-\frac{10}{15} = \frac{-3-10}{15} = \frac{-13}{15}\]

- anonymous

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

- anonymous

pull out a 4 out of the numerator.

- anonymous

-4kh

- anonymous

??

- anonymous

8-12 is - 4?

- anonymous

oh nvm its 2k-3h

- anonymous

good catch.

- anonymous

duuhh immma dork sometimes

- anonymous

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

- anonymous

1kh

- 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

- 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?

- anonymous

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

- anonymous

wait how did you figure that

- 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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