-12x-20-40plus 16x
-4x plus -60
        
             
        
        
        
Answer:
v=2
Step-by-step explanation:
9v=16+v
9v-v=16
8v=16
v=16/8
v=2
 
        
                    
             
        
        
        
Hello,
(-9)⁴= (-9).(-9).(-9).(-9)= 81.81 = 6561
        
             
        
        
        
Answer:

Step-by-step explanation:
Given Data,
Q=23000 J
c=4.184 J/g °c
Δt= 68 °c
m=?
By using this equation,
Q=mcΔt

 
        
             
        
        
        
Answer:
Take the alternating sum of the digits in the number, read from left to right. If that is divisible by 11, so is the original number. So, for instance, 2728 has alternating sum of digits 2 – 7 + 2 – 8 = -11. Since -11 is divisible by 11, so is 2728.