exam Maths Puzzle Numerical Ability

I need help with surface areas.
I have a piece of cheese where A=24 B=45 C=6.9 D=51
Rectangle is A=68 B=39 C=51
Cylinder is A=24 B=10 B is Height
I have no clue and cant figur

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exam Other Question

Solve this system of equations by graphing:
x – 2y = -2
x + 2y = 6
I am having trouble with solving by substitution. Please help.

5x-2y=-5
y-5x=3