exam Maths Puzzle Numerical Ability

A cylindrical can is to have the area of its curved surface equal to the sum of the areas of its base and its top. What must the relation between the height and the diameter of thi

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A triangular sail has an area of x^2 + 5x + square meters and a height of x + 3 meters. Find the lenght of the sail's base. 1.) Find the values of and that solve the following system of equations:
7x + 9y = 9
6x + 5y = -14

x =
y =

2.)Find the values of and that solve the following system o