Page 632 - Basic College Mathematics with Early Integers

Chapter 8 Review

(8.1) Evaluate each expression when x = 5, y = 0, and z =-2.

2x x + 7
1. 2. 4x - 3 3.
z y

y 7 + x
3
4. 5. x - 2z 6.
5x 3z

7. Find the volume of a storage cube whose sides 8. Find the volume of a wooden crate in the shape of a
3
3
measure 2 feet. Use V = s . cube 4 feet on each side. Use V = s .

2 feet
4 feet

9. Lamar deposited his $5000 bonus into an account 10. Jennifer Lewis borrowed $2000 from her grand-
paying 6% annual interest. How much interest will mother and agreed to pay her 5% simple interest.
he earn in 6 years? Use I = prt. How much interest will she owe after 3 years? Use
I = prt.

Simplify each expression by combining like terms.

2 9
11. -6x - 9x 12. x - x 13. 2y - 10 - 8y
3 10

14. 8a + a - 7 - 15a 15. y + 3 - 9y - 1 16. 1.7x - 3.2 + 2.9x - 8.7

Multiply.

17. -214y2 18. 315y - 82

Simplify.

19. 7x + 31x - 42 + x 20. 41x - 72 + 21

21. 315a - 22 + 101-2a + 12
22. 6y + 3 + 213y - 62

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