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Katieann16
Group Title
y varies directly with x, and y = 2 when x = 5.
What is the value of x when y = 15?
 one year ago
 one year ago
Katieann16 Group Title
y varies directly with x, and y = 2 when x = 5. What is the value of x when y = 15?
 one year ago
 one year ago

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Katieann16 Group TitleBest ResponseYou've already chosen the best response.1
@jim_thompson5910
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
y varies directly with x so this means y = kx where k is some fixed number
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
we are told that y = 2 when x = 5 so y = kx 2 = k*5 solve for k
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
when you solved for k, what did you get
 one year ago

Katieann16 Group TitleBest ResponseYou've already chosen the best response.1
wait how do i solve for k
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
2 = k*5 divide both sides by 5 to isolate k
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
k = ???
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you divided in the wrong order
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
good, so y = kx turns into y = 0.4x
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
now you want to find x when y = 15, so y = 0.4x 15 = 0.4x now solve for x
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you nailed it you can also represent 37.5 as the fraction 75/2
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
so x = 37.5 or x = 75/2
 one year ago

Katieann16 Group TitleBest ResponseYou've already chosen the best response.1
ok thank you(:
 one year ago

jim_thompson5910 Group TitleBest ResponseYou've already chosen the best response.1
you're welcome
 one year ago
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