Multiply and simplify if possible. 

A. 2
B. 2x4
C. 4x4
D. 2x8

Answer: B

Mathematics

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Rotate the coordinate axes to eliminate the xy term.7x2 + 6xy + 13y2 = 65

A.  +  = 1
B.  +  = 1
C. y' = 
D.  +  = 1

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Mathematics

Factor the polynomial completely. If a polynomial cannot be factored, state that it is irreducible.6x2 - 26x - 20

A. 2(3x + 2)(x - 5) B. (6x + 4)(x - 5) C. 2(3x - 2)(x + 5) D. irreducible

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Mathematics

Evaluate the expression for the given replacement values.x + yzwhen x = 2, y = -5, and z = -6

A. 18 B. -28 C. 32 D. 28

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Mathematics

Perform the indicated operations.(9x4y2 + 11x3y + 6y) - (2x4y2 + 8x3y + 4y + 7x)

A. 7x4y2 - 3x3y + 2y - 7x B. 7x4y2 + 3x3y + 2y - 7x C. 7x4y2 + 3x3y + 2y + 7x D. 11x4y2 + 19x3y + 10y + 7x

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Mathematics