Answer:
this one 1/5 = 3 x a
Step-by-step explanation:
1/5 =3×a  (divied both side by 3) 
a= 1/5 ÷3
 
        
                    
             
        
        
        
4in x 18in^2= 72 inches cubed
        
             
        
        
        
Hello there is a solution : 
 
        
        
        
Answer:
yes it is because the second triangle is the base and the other three triangles are the sides of the three dimensional shape
 
        
             
        
        
        
Answer:
5.85 m
Step-by-step explanation:
The width of the sand road can be calculated knowing its area and the dimensions of the rectangular garden as follows:

<u>Where:</u>
Ag: is the area of the rectangular garden
a: is the length of the rectangular garden = 50 cm = 0.5 m
b: is the width of the rectangular garden = 34 m
 
 
<u>Where</u>:
As: is the area of the sand road
The relation between the area of the sand road and the area of the rectangular garden is the following:



 
 
 
                               
By solving the above equation for x we have two solutions:
x₁ = -23.10 m
x₂ = 5.85 m 
Taking the positive value, we have that the width of the sand road is 5.85 m.
I hope it helps you!