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need help!!! Medalss!!!
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twitch
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simplify
-1/5 - 2/3
kugler97
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all you would do is get a caculator and type in -1/5 - 2/3 and you will get your answer..
twitch
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alrite hang on tell me if you get the same thing
kugler97
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okkayy.. lol
twitch
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-0.86666666666666666666666666666667
twitch
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lol
twitch
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did you get the same thing
kugler97
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yes i did.. lol
twitch
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but I dont thinks thats right
kugler97
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It is -0.86 you take the rest of the numbers off.. lol
twitch
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oh how would I put that in a fraction tho :)
kugler97
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you would take -0.86 and divide that by 100 and then tell me what you get ?!
twitch
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0.0086
kugler97
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i just did it and i got 0.0086
twitch
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so when does it become a fraction
kugler97
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then take that and put 86 over 100 and that's your answer (:
kugler97
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is it right?
twitch
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umm idk because my cousin got \[-\frac{ 13 }{ 15 }\]
kugler97
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hmmmm... not sure then sorry
twitch
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its okay thnx for trying
kugler97
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your welcome (:
twitch
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wbu tomo do you know how to do this problem
Twis7ed
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Find the greatest common denominator and simplify
tomo
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-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
\[\frac{-3}{15}-\frac{10}{15} = \frac{-3-10}{15} = \frac{-13}{15}\]
twitch
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alright hb
\[\frac{ 8k-12h }{ 4 }\]
tomo
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pull out a 4 out of the numerator.
twitch
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-4kh
tomo
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??
twitch
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8-12 is - 4?
twitch
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oh nvm its 2k-3h
tomo
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good catch.
twitch
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duuhh immma dork sometimes
tomo
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now you have
\[\frac{4*(2k-3h)}{4} = \frac{4}{4}*(2k-3h) = ?\]
twitch
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1kh
tomo
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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
twitch
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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?
tomo
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P(not x) = 1-P(x)
twitch
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wait how did you figure that
tomo
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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.