Evaluate the following.
1. If a = 2 and b = 3, what is a + (b x 5)?
2. If a = 22 and b = 12, what is ab - 8b?
3. Evaluate 3x + 3y, when x = -2 and y = 4.
4. Evaluate 1/2(2a + 5b), if a = 3 and b = 2.
5. Evaluate 7x / 2, when x = 4.
6. Evaluate 6x + 5, when x = -2.
7. Evaluate x + 8y, when x = -4 and y = 3.
8. Evaluate xy, when x = 5 and y = -3.
9. Evaluate x/y, when x = 27 and y = 9.
10. Evaluate 2x + 8, if x = 3.
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