exam Maths Puzzle Numerical Ability

-(-x)(-x)3(-x3)=when x=5

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exam Other Question

The length of a rectangle is 5cm more than twice the width. The preimeter of the rectangle is 34cm. Find the fimensions of the rectangle. is the complementary angle of (x+30) 90-(x+30) ? is the supplementary angle of same problem 180-(x+30) ? ty