When you add them by elimination method you do like 3x+3y=27 X - 3y=-11
+3y And -3y gets cancels out You left with 3x=27 X=-11
4x=16 Now you divide 4 on Both side so you get X=4 And now you plug your x value in any of the equation above and you get y value as Y=5
Answer from: Quest
2160ft^3 i think you could use a formala to you out with this in the future
Answer from: Quest
the first one is x^2+2x+2
the second one is x^2+4
the last one is x^2-4x+8
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