Step-by-step explanation:
let an amount be a 
increase an amount by 10% and then by 30%
= a*1.1 *1.3 = a*1.43
 
        
             
        
        
        
Answer:
33
Step-by-step explanation:
first you set up the problem, supplementary angles equal 180 degrees so the equation should look like, 4x+x+15=180. then you solve from there by combining like terms and you should get x equal to 33
 
        
             
        
        
        
Answer:
5 hours
Step-by-step explanation:
31-11 = 20
20/4 = 5
 
        
             
        
        
        
Answer:
<h2>Hey , I will help you.</h2>
Step-by-step explanation:
 
Given ,
x= 3.1 ,
= x= 31/10. ( As point removed)
= x = 3.1 { Will be itself}