airlovebelavia airlovebelavia

16-11-2019
Mathematics

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The slope of AB is 2/5 . A(3, k) is a point on the line AB. Find k if B(-7, 0).

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ray2me123 ray2me123

16-11-2019

slope of any line with 2 points is,

m=(y2-y1)/(x2-x1)

In this case,

m=2/5

(x1,y1)=(3,k)

(x2,y2)=(-7,0)

So,

》2/5=(0-k)/(-7-3)

》2/5=-k/-10

》k=20/5

》k=4

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