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True or False? Y varies directly with x and y = 9 when x = 3. When y = 27, the value of x is 9. someone PLEASE explain...:(
 one year ago
 one year ago
True or False? Y varies directly with x and y = 9 when x = 3. When y = 27, the value of x is 9. someone PLEASE explain...:(
 one year ago
 one year ago

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AriPottaBest ResponseYou've already chosen the best response.1
"y varies directly with x" is y = kx. we have to find out what k is. so we substitute 9 for y and 3 for x. 9 = 3k. can you tell me what k equals?
 one year ago

AriPottaBest ResponseYou've already chosen the best response.1
yep. so now we can substitute 3 for k and 27 for y to see if x equals 9. 27 = 3x
 one year ago

EmmaHBest ResponseYou've already chosen the best response.1
no x=3 it says so in the prob
 one year ago

AriPottaBest ResponseYou've already chosen the best response.1
no, that says when x = 3, y = 9. y and x can be any number. k is the only variable that is constant
 one year ago

EmmaHBest ResponseYou've already chosen the best response.1
ok sso its false though?
 one year ago

AriPottaBest ResponseYou've already chosen the best response.1
why do you think it's false? are you just guessing? :/
 one year ago

AriPottaBest ResponseYou've already chosen the best response.1
or did you do the math
 one year ago

EmmaHBest ResponseYou've already chosen the best response.1
i did the math 9=3k so 9/3=3k/3 k=3 right o9r am i totaolly off?
 one year ago

AriPottaBest ResponseYou've already chosen the best response.1
yea, k = 3, but we're trying to find out what x equals when y = 27
 one year ago

AriPottaBest ResponseYou've already chosen the best response.1
yes! which is not 9. so it's false. good job :)
 one year ago

elisichiBest ResponseYou've already chosen the best response.0
EmmaH, k=3. So, now you substitute it in to check what x is when y=27 27=(3)x x=9 Therefore, it is false.
 one year ago

elisichiBest ResponseYou've already chosen the best response.0
Sorry I just realised I came in a little too late
 one year ago

EmmaHBest ResponseYou've already chosen the best response.1
thanks guys...wait are you both guys right?
 one year ago

elisichiBest ResponseYou've already chosen the best response.0
I'm a girl :D But close enough!
 one year ago

EmmaHBest ResponseYou've already chosen the best response.1
hu ....but thanks anyways
 one year ago

EmmaHBest ResponseYou've already chosen the best response.1
lolo thats a way of saying it :)
 one year ago
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