Answer is 42, hope this helps
        
             
        
        
        
Two acute angles is the least amount.
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
-5x+31+3x=3
move everthing to one side
-5+31+3x-3=0
add and subtract common terms
-2x+28=0
divide across by common denominator
-x+14=0
Solve for x
x=14
 
        
             
        
        
        
Answer:
52 ft^2
Step-by-step explanation:
To find the area you just multiply 13 feet (length) by 4 feet (width). This gives you 52 feet squared because we are dealing with area and square feet.
 
        
                    
             
        
        
        
The first two rows of coefficients are identical, so by inspection, the determinant is 0.