exam Maths Puzzle Numerical Ability

The area of a parallelogram is 24.96 cm squared. The base is 6.4 cm. If the measures of the base and height are each doubles, find the area of the resulting parallelogram.

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exam Other Question

simplify:14/-2
5(-4)
7-(-3)
-7(4)
x-5=-3
4x=-8
x/2=-8
-2x=6
x/-5=4
1) Is it always possible using the elementary row operations for matrices ( to transform any square matrix into echelon form with all 1's along its main diagonal?

2) Can you ta