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______12. What is the leading coefficient in
7x2 - 2x3 + 3x ?
A. - 2x3 B. 7x2 C. - 2 D. 7

______13. In the expression (5m3)4, which is the base? A. 5 B. m C. 5m3 D. m3

_____ 14. Which of the following is the standard form of 6x4 – 3x2 + x5 + 7 ?
A. – 3x2 + 6x4 + x5 + 7 B. 6x4 – 3x2 + 7 - x5 C. 6x4 + x5 – 3x2 + 7 D. x5 + 6x4 – 3x2 + 7

_____15. Which of the following is the degree of the polynomial 58 – 2x3y2 + 7x5yz – 3y6?
A. 6 B. 5 C. 8 D. 7