Answer:
(a)
if  then
 then   and if x<0 then
 and if x<0 then 
(b)
That is straightforward from what you showed on theorem 3.25
(c)
Following the same ideas from (a) x>a or -x > a. 
Step-by-step explanation:
Remember how we define the absolute value of a number.
(a)
In general 

Therefore if  you have two cases, if
   you have two cases, if  then
 then   and if x<0 then
 and if x<0 then 
(b) 
That is straightforward from what you showed on theorem 3.25
(c)
Following the same ideas from (a) x>a or -x > a. 
 
        
             
        
        
        
Answer:
a) 24
b) 16
Step-by-step explanation:
a) Total Students = 40
 Boys= 40*(3/5) = 24
b) Total Students= 40
 Boys= 24
 Girls= (40-24) = 16
 
        
             
        
        
        
Answer:
Check pdf
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
A.47.5 miles is 76
Step-by-step explanation:
in real life its like 76.44, but im rounding