exam Maths Puzzle Numerical Ability

show how to get the square root of 5,248 - need to see step by step

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exam Other Question

Ok, I answered this but I want to make sure that I got it right before turning it in.

Solve the system by addition or substitution.
3x - 4y = 8
6x - 2y = 10
What is the graph of the equation 5x2 + 2y2 + 30x - 16y + 67 = 0?