The slope of a line that is perpendicular to a line whose slope is -2/7 is a) -2/7 b) -7/2 c) 7/2

The answer is C.

Perpendicular lines have opposite reciprocal slopes. That means one is negative and the other is positive, and the fractions are flipped.

You just need to flip the sign and the numbers. 

-2/7= 2/7

7/2

So, "C" is the correct answer. 

I hope this helps!
~kaikers

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Recall that area of the triangle is 1/2*(base)*(height)1/2*(13)*(17) = 110.5the answer is 110.5