Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(5x + y)(5x - y)

A. 25x2 - 10xy - y2
B. 25x2 - y2
C. 10x2 - y2
D. 25x2 + 10xy - y2

Answer: B

Mathematics

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Determine if the statement is a proportion.I.    II.     

A. I is a proportion, II is not a proportion. B. I is not a proportion, II is a proportion. C. I and II are both proportions. D. Neither I nor II are proportions.

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Write as an equivalent addition statement. (Do not evaluate.)1 - 21

A. 21 + (-1) B. 1 + 21 C. 1 + (-21) D. 21 + 1

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Multiply.(-0.4)(-0.9)

A. -1.3 B. 0.36 C. -0.5 D. -1.2

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Divide using synthetic division, and write a summary statement in fraction form.

A. 2x4 + x3 + x2 + 4x + 3 + 
B. 2x4 + x3 + 4x2 + 3x + 
C. 2x4 + x3 - x2 + 2x + 1 + 
D. 2x4 - 3x3 + x + 

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