# Exam: 050293RR - Rational Expressions

Exam: 050293RR - Rational Expressions

1. Perform the indicated operations and simplify the following expression:

2. Perform the indicated operations and simplify the following expression:

3. The total resistance R of two resistors in parallel is given by  where R
first and R

4. Divide the following expression:

5. Factor and simplify .

6. After t hours of work, Group A completes  of a job and Group B completes  of the same job.
What expression represents the amount the two teams would complete after t seconds, working together?

7. Perform the indicated operations and simplify the following expression:

8. Solve the following equation:
A. z = –4
B. z = 6
C. z = 4
D. z = –6

9. Divide the following expression:

10. Your textbook says that the focal length f of a lens is given by the lensmaker's formula where r
11. Simplify the following expression:

12. Solve this proportion for the variable:
A. y = 4
B. y = 2
C. y = –2
D. y = –4

13. Perform the indicated operations and simplify the following expression:
14. Perform the indicated operations and simplify the following expression:

15. Solve the following equation:
A. y = –4
B. y = 4
C. y = –3
D. y = 3

16. Simplify the expression

17. Find the result of the polynomial division (3x
18. Simplify .
A. –a
B. –a
C. –a
D. –a
19. Solve this proportion for the variable:
A. x = 10
B. x = –7
C. x = –10
D. x = 7

20. Simplify the following expression: