1. -6 - 15 -9 -21 9 21 2. 4 - 10 -6 6 14 -40 3. 7 - (-2) + (-1) 4 10 6 8 4. -9 + 9 0 18 1 -1 5. (-7)(-2) -9 -5 -14 14 6. (3)(-5) 15 -15 -8 -2 7. 30/-6 -5 5 24 -36 8. 4(0) 4 -4 0 undefined 9. -12/-4 -3 3 -8 -16	10. (-1)3 - (-4) -3 5 1 3 11. (-3)2 - (-4) 13 5 -13 10 12. -3 + 2(-7) 11 -11 -17 7 13. 7 -13 -7 13 14. 4 -4 -20/3 -16 15. undefined 13 6 0 16. Evaluate 3x - 4y if x = -5, y = 2 -7 7 -23 -2 17. Evaluate -x2 - 2y2 if x = -4, y= -3 -2 -26 -34 -28 18. Evaluate 3(x - y) if x = 3 and y = -2 15 3 7 8

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