- How would I sketch f(x,y) = x^2 + 9y^2 on the xy plane? I know it is a circle.?

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Discrete Help ASAP. Please write out symbolic notation.? Find all of the actual roots of the polynomial: x^3 - 2x^2 + 5x + 26 = 0? In one mole of the compound iron(III) oxide,
what fraction of the total number of ions is
the oxygen ion? Find Marginal Cost from total cost function (P^2)A(P)? Problem involving math induction! 1. Prove for every integer p, p^2 + 3p + 8 is even.?