isaac1925 isaac1925

14-11-2017
Mathematics

contestada

If y varies directly with with x and y=20 when x= 2.5, what is the value of y when x = 8? (type the numerical value of x only)

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choixongdong choixongdong

14-11-2017

y = kx
k = y/x = 20 / 2.5 = 8
when x = 8
y = kx = 8* 8
y = 64

answer
64

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