exam Maths Puzzle Numerical Ability

Graph this equation below using the indicated method.

y = -2/3x + 4

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exam Other Question

an equilateral triangle has as many centimeters in its perimeter as square centimeters in its area. what's the length of a side of the triangle? (x/x+1) - (2/x-1) - 1

please explain/show this to me... i tried doing it and again, only got very partial credit . i dont understand the whole LCD thing with the negatives...