X=length
y=width
Area (rectangle)=length x width
we suggest this system of  equations:
y=x/5
xy=9/20
solve this system of equations by substitution method:
x(x/5)=9/20
x²/5=9/20
Least common multiple=20
4x²=9
x²=9/4
x=⁺₋√(9/4)
we have two solutions:
x₁=-3/2   it does not validate
x₂=3/2    ⇒y=x/5=(3/2)/5=3/10
The dimensions of the lake are:
lengh=3/2 miles
width=3/10 miles
to check:
Area=3/2 miles x 3/10 miles=9/20 miles².
width is 1/5 the length of the lake ⇒  3/10 miles=(3/2) /5 miles
        
             
        
        
        
Answer: D, Y, X 
<u>Step-by-step explanation:</u>
The (salad, sandwich) coordinates are as follows:
A: (0, 10)
B: (1, 8)
C: (2, 6)
D: (3, 4)    MOST EQUAL AMOUNTS
E: (4, 2)
F: (5, 0)
X: (4, 8)    OUTSIDE OF THE PRODUCTION LINE
Y: (1, 3)     UNDER THE PRODUCTION LINE
 
        
                    
             
        
        
        
Answer:
29
Step-by-step explanation:
 
        
                    
             
        
        
        
The same as the greatest number that can be written 
with 10 binary bits:  <u>1,024</u>
        
                    
             
        
        
        
Answer:
B. the initial amount of money invested
Step-by-step explanation:
Principal is the money invested or the money that a lender lend the borrower. Such money is the basis on which the interest payable will be calculated after considering the numbers of years and installments.