The sum of two supplementary angles is 180 degrees. 
A+B=180.
80+B=180
B= 180-80
B=100
 
        
                    
             
        
        
        
100 
75 times 1.333333333333333 equals 100
        
                    
             
        
        
        
Answer:
12
Step-by-step explanation:
6in x 2in = 12
 
        
                    
             
        
        
        
To solve these kinds of problems, it is necessary to isolate x:
9(2x + 1) <span>< 9x - 18
Distribute 9:
18x + 9 </span><span>< 9x - 18
Subtracting 9 from both sides of the equation:
18x + 9 - 9 </span><span>< 9x - 18 - 9
18x </span><span>< 9x - 27
Subtracting 9x from both sides of the equation:
18x - 9x </span><span>< 9x - 27 - 9x
9x </span><span>< -27
x </span><span>< -3
Therefore, values of x </span><span>< -3 will satisfy the given equation.</span>