If there are 20 groups of 10, then there are 200 pencils. Subtract 200 and 137 to get the number of dull pencils.
        
                    
             
        
        
        
X - 4 = -4 -4
Combine the two -4.
X - 4 = -8
Add 4 on both sides to isolate the x and get your answer.
X = -4
2 - 3x = -x - 8
Subtract the 2 on both sides.
-3x = -x - 10
Add the x on both sides.
-2x = -10
Divide by -2 on both sides to isolate the x and get your answer.
x = 5
        
             
        
        
        
Step-by-step explanation:

 
        
                    
             
        
        
        
Since the sequence is arithmetic, we have an expression of the form:
 
 Where,
 a1: first term of the sequence
 d: common difference
 n: number of terms
 We look for the common difference: 

 Then, setting values we have: 

 Then, the sum of the terms is: 

 Substituting values: 
 Answer:
 Answer:
 the sum of the arithmetic sequence 8, 15, 22 is:
 Sn = 2483
 
        
        
        
Answer:
Y=2x-5
Step-by-step explanation:
Parallel m=2
Y=mx+c
-1=2(2)+c
C=-5