Participation - Partner Problem 1 You may work with a partner from this class to solve this problem. It should be submitted in class on Tuesday February 19 or dropped at my office Young 113A before...

Sol: (1) 12 3 6 and 7 4 10x x   
Taking first inequality,
12 3 6
12 6 3 Subtract 3 from both sides
12 3 Combine terms on the left side
0.25 divide both sides by 12 to isolate
x
x
x
x x
 
 



Taking second inequality,
7 4 10
7 10 4 Add 4 to both sides
7 14 Combine the terms on the left side
2 Divide both sides by 7 to isolate
x
x
x
x x
 
 



Answer in Interval notation is:    0.25,0 2,
,
Sol: (6) 4 2 6 or 5 2 7x x   
Taking first inequality,
4 2 6 start with this inequality,
4 6 2 Add 2 to both sides,
4 8 Combine the terms on left side,
2 Divide both sides by 4 to isolate ,
x
x
x
x x
 
 



Taking second inequality,
5 2 7 Start with this inequality
2 7 5 subtract 5 from both sides
2 2 Combine the terms on left side
1 Divide both sides by 2 to isolat
x
x
x
x
 
  
 
  e
1 Multiply by -1 and change the sign
x
x 

Answer in interval notation is:    ,1 2, 
,
Sol: (3) 6( 2) 12 or 5 3 22x x   
Taking first inequality
6( 2) 12 start with this inequality
2 2 Divide both sides by 6
4 Add 2 to both sides
x
x
x
 
 

...