exam Maths Puzzle Numerical Ability

Graph the equation

-x - y = - 8

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exam Other Question

The length of a rectangle is 5 cm more than 4 times its width. If the area of the rectangle is 80 cm2, find the dimensions of the rectangle to the nearest thousandth.

Please Help! (3x^2+2x-5/5x+1)+(2x^2-x+6/5x+1)

I have no idea how to do this problem
Key ^=exponents /=all over or fraction