Solve the problem.In how many ways can a student work 7 out of 10 questions on an exam?

A. 120
B. 21
C. 720
D. 10,000,000

Answer: A

Mathematics

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B. 2-2 = 
C. 22 = 
D. 2 = 2

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A. 4
B. 4
C. 4
D. 4

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Identify the expression as a polynomial or not a polynomial.5x2y3 + 6x3y + 4x

A. Polynomial B. Not a polynomial

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Multiply.(11y + x)(11y - x)

A. 121y2 + 22xy - x2 B. 121y2 - 22xy - x2 C. 121y2 - x2 D. 22y2 - x2

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