Add.(-9y2 - 20y + 19) + (2y2 + 2y).

A. -7y2 - 18y + 19
B. -7y4 - 18y2 + 19
C. -7y2 - 18y - 19
D. -25y6 + 19


Answer: A

Mathematics

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A. Polynomial of degree 4 B. Polynomial of degree 14 C. Polynomial of degree 5 D. Polynomial of degree 13

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A. stratified sample B. convenience sample C. simple random sample D. systematic sample E. cluster sample

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A. 16
B. 18
C. 19
D. 17

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Translate the words into mathematics. Do not answer the question.What is the difference between 31 and 8?

A. 31 - 8 B. 8 - 31 C. 31 + 8 D. 31 ? 8

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