C I believe it not so sure
        
             
        
        
        
8 to 16
2 to 4
13 to 26
5 to 10
6 to 12
        
                    
             
        
        
        
Answer:
13 pencils.
Step-by-step explanation:
Let x be the pens and y be the pencils
Given:
Brian purchased pens for 75 cents each and pencils for 40 cents each he bought total of 22 writing utensils for $11.95.
Total pens and pencils is 22
So,  ----------------(1)
----------------(1)
And he bought all utensils for $11.95. and each pen for 75 cents and pencils for 40 cents.
 ------------(2)
------------(2)
solve equation 1 and equation 2 for x and y.
From equation 1.

 ----------------(3)
----------------(3)
put y value in equation 2.







Now substitute x value in equation 3.


So, he buy 13 pencils.
 
        
             
        
        
        
Answer:
c = 8.14 million×(0.9166)^t
4.83 million  
Step-by-step explanation:
Data:
   t = y - 2007
c₀ = 8.14 million
c₃  = 23 % less than c₁
Part 1. Calculate c₃
c₃ = c₀(1 - 0.23) = 0.77c₀
Part 2. Calculate r
       c₃ = c₀r^t
0.77c₀ = c₀r³
    0.77 = r³              Divided each side by c₀
          r = 0.9166     Took the cube root of each side
The explicit decay model is c = 8.14 million×(0.9166)^t
Part 3. Prediction
t = 2013 - 2007 = 6
c = c₀r^t = 8.14 million×(0.9166)⁶ = 8.14 million × 0.5929 = 4.83 million
The model predicts that there will be 4.83 million cars for sale in 2013.
 
        
             
        
        
        
Answer:
Subtract 4 from each side 
Step-by-step explanation:
 x + 4 > -8
Subtract 4 from each side 
 x + 4-4 > -8-4
x>-12