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Maths Puzzle
Numerical Ability
An example of an invertible 1x1 matrix. An example of a noninvertible 2x2 matrix with 1s on the main diagonal.
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How do I solve this problem by graphing it?
2x = y + 1
2x - y = 5
an isosceles triangle has an area of 200 square units, and the altitude to the base measures 10 units. what is the perimeter of the triangle?