Answer:
The greatest common factor of the terms is 1.
Step-by-step explanation:
The terms have no variables in common, and the coefficients have no factors in common. The greatest common factor of the terms is 1.
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The discriminant is negative (40² -4(30)(51) = -4520), so any linear factors will be complex.
6 is what you're dividing by so it goes on top as the numerator and x + y is the denominator: 
I believe it is 8,000 grams :).
5 multiply by 8=40
40 divided by 20=2
So each person gets 2 slices of pizza
To solve for x^2 - 40 = 9, take the square roots of both sides and solve.
The answer is x = 7, -7.
