book Maths Puzzle Numerical Ability

I am taking a College algebra course through BYU and there is no text book just course handouts. I need help finding the equation of an ellipse with foci at (-8,0) and (8,0) and

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if p = 2l + 2w what is the perimeter of a rectangle that is 6 in x 7 in ? could you please explain to me how to do this, because my teacher does not... i need help with this inequality:

3x-5<2 {integers}

when i tried this problem i +5 to both sides so the 5 would cancel out and then i divided 3x on both sides then i c