Combine like terms. Then write the polynomial in descending order of powers.-9y3 + 2y2

A. -7y5
B. -7y2
C. -7y3
D. Cannot be simplified

Answer: D

Mathematics

Solve the problem.Evaluate cos-1 .

A.
B. -
C. Undefined
D. -

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Mathematics

Identify the probability statement as empirical or not.The probability of federal taxes being raised in a randomly chosen year is 0.30.

A. Empirical B. Not empirical

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Mathematics

Simplify. Write your answer with positive exponents only.(a-5 + b-3)-3

A. ³
B. ³
C. a¹⁵ + b⁹
D. ³

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Mathematics

Approximate the expression to the nearest thousandth.8.6(4.72) - 2(2.8) + 6

A. 190.374 B. 184.374 C. 196.374 D. 117.374

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Mathematics