exam Maths Puzzle Numerical Ability

The length of a rectangle is 1 inch. less than twice the width. the area of the rectangle is 21 spuare inches. What is the length of the rectangle.

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exam Other Question

you are deciding between two cars with different engines and want the bigger of the two. One engine displaces 350 cubic inches. The other displaces 5,500 cubic centimeters. By how many cubic centimeters is the bigger engine larger than the smaller one? What is f(x + 1) if f(x)= 6x^3 - 3x^2 + 4x - 9

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