The square root of 640 is 25.29
        
                    
             
        
        
        
Angle E=130degrees because those two are congruent. Therefore if you 180-130 you'll get the other angle in the triangle with 70degrees and y. 180-130=50degrees. Then add 50 and 70. 50+70=120degrees. A triangle is supposed to have 180 degrees inside. 
180-120=60degrees. 
Therefore y=60degrees
        
             
        
        
        
Answer:
5, 6 and 7.
Step-by-step explanation:
5/8 is proper  while 5/4 is improper
6/8 is proper while 6/4 is improper   
7/8 is proper while 7/4 is improper
 
        
             
        
        
        
Answer:
last one
Step-by-step explanation:
anything with a ^2 is squared and ^3 is cubed