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mgmat-lines never lies

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mgmat-lines never lies

by pradeepkaushal9518 » Fri Jul 16, 2010 3:09 am
Line l is defined by the equation y - 5x = 4 and line w is defined by the equation 10y + 2x + 20 = 0. If line k does not intersect line l, what is the degree measure of the angle formed by line k and line w? (Assume that all lines lie in one coordinate plane.)

0


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It cannot be determined from the information given.
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by kvcpk » Fri Jul 16, 2010 3:46 am
Line l is defined by the equation y - 5x = 4 and line w is defined by the equation 10y + 2x + 20 = 0. If line k does not intersect line l, what is the degree measure of the angle formed by line k and line w? (Assume that all lines lie in one coordinate plane.)

L: y - 5x = 4
W: 10y + 2x + 20 = 0

y=5x+4 doesnot intersect W. Which means they are parallel.
Hence K has the same slope as L which is 5

Slope of W is -2/10 = -1/5

Slope of W * Slope of K is -1/5*5 = -1

Hence they are perpendicular. 90degrees

pick E
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