book Maths Puzzle Numerical Ability

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

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book Other Question

How could I create a slope-intercept form if I am given this information: x int = 3, y int = 2. The only equation I could find to use was y-2 = m(x-3). Is this the correct form to use? 2
what is (-2)(-5) (3)