exam Maths Puzzle Numerical Ability

How do you solve 2 over 3 minus the square root of 5?

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exam Other Question

Matrix:
Show that the equation AX=B represents a linear equation of two equations in two unknowns. Solve the system and substitute into the matrix equation to check your results. The Perimeter of a rectangle is 42 cm. One side is 9 cm longer than the other side. Find the lengths of the sides.