Multiply.(6x + 5y)2
A. 6x2 + 60xy + 25y2
B. 6x2 + 25y2
C. 36x2 + 25y2
D. 36x2 + 60xy + 25y2
Answer: D
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Find the center of mass of a thin plate covering the given region with the given density function.The triangular region cut from the first quadrant by the line y = -x + 7, with density ?(x) = x
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Solve the problem.A rectangular box is to be inscribed inside the ellipsoid 
Find the largest possible volume for the box.
A. 12
B. 15
C. 18
D. 16
Evaluate the expression. Write your answer without exponents.(-10)0
A. -10 B. 0 C. -1 D. 1
Solve the system of equations using elimination.
A. x = -2, y = -5; x = -5, y = -2 B. x = 2, y = 5; x = 5, y = 2; x = -2, y = -5; x = -5, y = -2 C. x = 2, y = 5; x = -2, y = 5 ; x = 2, y = -5; x = -2, y = -5 D. x = 2, y = -5; x = 2, y = 5