Ch. 7 Practice Test

1.   What number or numbers make the rational expression undefined?  

2.   What number or numbers make the rational expression undefined?    

3.   Reduce to lowest terms:    

Problems 4 – 6, multiply.

4.   

5.   

6.   

Problems 7 – 8, divide.

7.   

8.   

9.  Find the missing value.     

10.    Add.   

11.    Subtract.   

12.    Simplify the complex fraction.   

13.    Solve for x.   

14.    Solve for m.   

15.   Tom can mow the yard in 7 hours.  Mack can mow the same yard in 5 hours.  How long would it take to mow the yard if they worked together?

(Give answer in hours and minutes.)

 KEY:

1.    - 4

2.    - 5, 8

3.   

4.   

5.   

6.    3a + 18

7.   

8.   

9.   

10.   

11.   

12.   

13.    x = 2

14.    no solution  (since x = 4 makes one of the rational expressions undefined)

15.    2 hours and 55 minutes