In this case you would set it up as

(180 represents the degree of the triangle)
Add up like terms

Subtract 130 to the other side (180-130)

Divide 10 to the other side ( 50/10)
.

Hope this was clear :)
 
        
        
        
Answer:
Perimeter=10L
Step-by-step explanation:
The solution is in the image
 
        
             
        
        
        
Interest earned in a month
(1.5/100) * 6000
90
Number of months in 4 years 
12*4
48
So the interest earned in 4 years
90*48
4320 dollars
        
             
        
        
        
Answer:
bruh... ..
Step-by-step explanation:
dude wut r we actually suppose to do