Answer:

13. What is the sum of (3x-5y) and (-8x-10y)? A.-11X- 15y B. -5x - 157 C. -5x - 5y D. 11X-157 14.

14. What is the sum of (6x2 - 4x2 + 3) and ( -x2 + x-3)?

A. 6X-3x2 + x B. 6x + 3x2 + x C. 6x3-5x2 + x D. 6x2 + 5x2 + x

15. Solve: (4x + 2xy + 5xz) - (-4x - 3xy + 4xz)

A. 8x + 5xy + XZ B. -XY + 9xz C. xy + 9xz D. 8x - 5xy - XZ

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