veronicahayes veronicahayes

16-08-2017
Mathematics

contestada

the slope of a line is -2 and the line contains the points (7,4) and (x,12). what is the value of x?

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kphung76127 kphung76127

16-08-2017

Slope= y2-y1/x2-x1.

-2= (12-4)/(x-7)
-2= 8/(x-7)
-2(x-7)=8
-2x+14=8
-2x=-6
x=3

Final answer: x=3

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