Answer:
51in
Step-by-step explanation:
you first have to find the area of the square by multiplying 6 and 7 which is 42. Then you have to find area of the triangle and the formula to do that is (length×width)÷2 . to find the length you have to subtract 7 from 13 which is 6 and the length you have to do 6-3 which is 3 then (6×3)÷2=9 and then you add the area of the square and the area of the triangle and get 42+9=51
 
        
             
        
        
        
2y - 18x = -26 
Add 18x to both sides. 
2y = -26 + 18x 
Divide by 2 on both sides. 
y = -13 + 9x 
y = 9x - 13
        
             
        
        
        
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