exam Maths Puzzle Numerical Ability

Write an algebraic expression, an equation or an inequality.

The difference of 3 times a number x and 11

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exam Other Question

The length of a rectangle is 5 meters longer than the width. Find then length and width if the perimeter is 54 meters. A square sheet of Aluminum is placed in the hot sun. It begins to expand very slowly so that its diagonal is increasing at the rate of 1 milimeter per minute. At the moment that the diagonal is 100 milimeters, at what rate is the area increasing?