Answer:
x=3 and y=2
Step-by-step explanation:
1.) 4x+3(5x-13)=18
expand into 4x+15x-39=18
18+39= 57
15x+4x= 19x
57/19= 3 so x=3
substitute 3 into y= 5x - 13
and you get 2 so y=2
 
        
             
        
        
        
Answer:
1 = 40
2 = 140 
3 = 40 
4 = 140
5 = 40
6 = 140
7 = 40
Step-by-step explanation:
A straight line is 180 so I did 40 because 140 + 40 = 180. once I figured 3 out I basically had the rest.
 
        
             
        
        
        
Answer:
I think it is 20cm
Step-by-step explanation:
 divide 80 by 4 =20 cm
 
        
             
        
        
        
Answer: 20.52
Step-by-step explanation:
Your welcome