Answer:
8cm
Step-by-step explanation:
 
        
             
        
        
        
Answer:22:2=11
28:2=14
34:2=17
40:2=20
46:2=23
 14-11=3
 17-14=3
 etc
23-20=3
Step-by-step explanation:sorry I don’t write English and you should translate
Số đằng sau hơn số đằng trước 3 đơn vị
Thank you translate 
 
        
             
        
        
        
Answer:
nothing definite can be said and square 
 
        
                    
             
        
        
        
In private correspondence with the author of the question, it was determined 
that 'y' is the variable of integration.
Therefore, 'a' is a constant for purposes of this integration, and that whole 
'a' business can be taken outside the integral.
Integral [a/(1-ay) dy] = a/(1-a) integral [dy/y] = a ln(y)/(1-a)    +  C
        
             
        
        
        
60 = 2 ( length + width ) 
<span>30 = length + width </span>
<span>Let length be = x and width = y </span>
<span>x+y = 30 </span>
<span>xy = 209 </span>
<span>4xy = 836 </span>
<span>( x+ y)^2 = 900 </span>
<span>( x+y)^2 - 4xy = 900-836 = 64 </span>
<span>( x-y)^2 = 64 </span>
<span>x- y = 8 </span>
<span>x+y = 30 </span>
<span>ADD 2x =38 </span>
<span>x = 19 </span>
<span>y = 11 </span>
<span>ANSWER 19cm X 11cm</span>