160 is 25% of 640 
PLEASE RATE AS THE BRAINLIEST ANSWER! THANK YOU! :)
 
        
             
        
        
        
Answer:
x = 31.2
Step-by-step explanation:
 x - 19.7 = -4.1
x - 19.7 = -4.1
 x = 15.6 --- add 19.7 to both sides to get rid of -19.7
x = 15.6 --- add 19.7 to both sides to get rid of -19.7
x = 31.2 --- multiply both sides by 2 to get rid of 
 
        
             
        
        
        
Answer: 10 bottles
Step-by-step explanation: 8 x 5 = 40. 2 x 5 = 10
 
        
             
        
        
        
Answer: 30°
Step by step explanation: 
1) Supplementary angles add up to 180°
2) (2x+10)+(5x-40)=180
3) solve for x
4) x=30