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If y varies directly with x, and y is 12 when x is 8, find y when x is 9.​

 Mar 1, 2021
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y = kx

 

12 = k * 8

 

12/ 8   =  k   =  3/2

 

So....when  x =  9  

 

y  = (3/2) (9)

 

y =   27 / 2   =  13.5 

 

 

cool cool cool 

 Mar 2, 2021

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