Lines are perpendicular if the slope of one is the negative reciprocal of the other. In this case the slopes are -8/3 and 8/3, so while negative they are not reciprocal. So no, the two lines intersect but are not perpendicular.
Divide each term in the numerator by the denominator...
2xy^2-1
The answer to your question is <span><span><span>0.494</span>
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the answer for 1 2 and 3 is a c d
