book Maths Puzzle Numerical Ability

How do I simplify the following, assuming X, and Y are not zero?

-x^2y
(-x^2)^2y^2

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book Other Question

Hello,

How do you find where a liine intercepts another point on a graph.

For example:

Line y=2/3x+13.5 and Line y=-1/2x+3

where do they intersect?

thank you Hello,I am a junior in Honors Pre-Calculus and I am not sure how to do these problems:

1) Suppose you have 102m of fencing to make two side-by-side rectangluar enclosures, as sh