Answer:
60
Step-by-step explanation:
calculated it with scientific calculator 
 
        
             
        
        
        
The first choice is substitution because G s being substituted by C
        
             
        
        
        
Answer:
Amount of mercury in population is in between 0.2841 , 1.1531
Step-by-step explanation:
Step by step explanation is given in the attachments 
 
        
             
        
        
        
Answer:
Angles W, Z, M, P are 111°
Angles Y, X, O, N are 69°
 
        
             
        
        
        
Answer:
The value of x is 75
Step-by-step explanation:
First we need to find the other angle that doesn't have a number in it. 
To find the degrees of the other angle we subtract 155 from 180.
180 - 155 = 25
Now we have to find the value of x. Add 80 and 25 together to get 105. A triangle is going to be 180 degrees. Subtract 105 from 180.
180 - 105 = 75
Now we will add 80, 25, and 75 to check our work.
80+25+75 = 180