exam Maths Puzzle Numerical Ability

Please graph the following: x-y=6
x+2y=-9
Thank you.

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exam Other Question

Find values for m and b in the following system so that the solution to the systemis (-3, 4).
5x + 7y = b
mx + y = 22

What is ThE vOLUME OF A SPHERE WITH A RADIAS OF 40