Answer:
900 batteries 
Step-by-step explanation:
First we must find how many batteries does 1 calculator need
we can do this by dividing 160 by 40
which will give us 4 batteries per calculator
then we multiply the amount of calculators we have with 4 
225×4 = 900 so we need 900 batteries 
 
        
             
        
        
        
s is less than or equal to 75
 
        
             
        
        
        
123a
123q
123w
123e
123r
123t
123y
123u
123i
123o
123p
123s
123d
123f
123g
123h
123j
123k
I thought this would be easy lol, I tried, sorry for not getting an answer
        
             
        
        
        
Answer:
y=65
x=50
Step-by-step explanation:
exterior angle of a triamgle is equal to sum of two interior angles 
so
2y=130(as it is isosceles triangle)
y=65
we know y+y+x=180(sum of all angles of triangle)and (vertically opposite angle)
therefore, x=50
 
        
                    
             
        
        
        
Answer:
use Pythagoras theorem to find hypotenuse in right angle triangle