5x-2y=3
-5x+4y=9
2y= 12
divide it by 2
y= 6
put y in any equation
5x-2 (6)=3
5x-12=3
5x= 3+12=15
divide by 5
x=3
y= 6
        
                    
             
        
        
        
Answer:
(6x-5y)(20y-23x)
Step-by-step explanation:
x(6x - 5y) - 4(6x - 5y)^2
= (6x-5y)(x-4(6x-5y))
= (6x-5y)(x-24x+20y)
= (6x-5y)(20y-23x)
 
        
             
        
        
        
Answer:

Step-by-step explanation:

 
        
             
        
        
        
Answer:
80 cm
Step-by-step explanation:
5 points in a star, each point has a perimeter of 16, 
16 x 5 = 80
or just legit add all the 8's
DONT FORGET TO INCLUDE THE UNITS
 
        
                    
             
        
        
        
Answer:
1) x= 3i, x= - 3i
2) x= +i , x = - i
, x = - i
Step-by-step explanation:
1) x^2+9=0
(x+3i)(x-3i)=0
x= 3i, x=-3i
2) x^2-4=-11
x^2=-7
x= ±i
x= +i , x = - i
, x = - i
hope this helps!! :))