Math 112        Test 1    10 pts each          Jan. 22, 2004


                                                                                                                                                                        Solve for x:

 

1.   5x - (3x - 4 ) - 2 = 5 - 2(3x + 2)

 

 

2.    

 

3.    

 

4.  

 

 

5.   Solve for d

 

an = a1 + (n-1)d

 

 

Solve the system of equations

 

6.   2x - y = 16

 x + 3y = 1

 


7.   2x - y = 4

 6x  - 12 = 3y

 

 

8.  Solve the linear inequality. Leave the answer in inequality notation.

3x - 2 ² 4(x + 2) - 5

 

9.  Solve the linear inequality.  Put the answer in Interval notation.

 

6 ³ 2(1 - 3x)  > 0

 

 

10.  a.  Express this set in inequality notation.

 

 

 

 

b.  Express this set in interval notation.

 

Bonus:  5 points !

 

If a and b are negative numbers and b/a is greater than 1, then is a-b positive or negative?