7x^(2)-21y^(2) x^(2)=28 (Write an equation for the cross section at z=0 using x and y.) (Wrike an equation for the creas section at y=-2 using x and z.) (Write an equation for the cross section at y=0 using x and z.) (Write an equation for the cross section at y=2 using x and 2 .) (Write an equation for the oross section at x=0 using y and 2 .)
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(If an answer does not exist, enter DNE. Select Update Graph to see your response plotted on the screen. Select the Submit button to grade your response.) $7x^2 - 28y^2 + z^2 = 28$ (Write an equation for the cross section at $z = 0$ using $x$ and $y$.) $x^2 + 4y^2 Show more…
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