Answer:
Step-by-step explanation:
Let's begin the solution by isolating the 4x term:
 4x- c= k  =>  4x = c + k
Now divide both sides by 4:
           c + k
x = --------------
               4
This does not match Answer C, but would match Answer C if k + c were divided by 4.  Answer C, as shown, is incorrect.
 
        
             
        
        
        
1= 15
2= 12
Hope this helps
        
             
        
        
        
Answer:
4x
Step-by-step explanation:
When multiplying a number by a variable the number is written first and then the variable. It can be represented like this: 4(x). If you simplify that you get 4x.
 
        
                    
             
        
        
        
Answer:
15/60×100=25%
Step-by-step explanation:
the number of students wanted to go outside/the whole number of students×100
15/60×100=25%
 
        
             
        
        
        
Correct Question:
At a bake sale, plates of cookies, p, are sold for $5 each. The amount of money from the sale of cookies is expressed as dollars, d. Which equation represents the earnings of the bake sale?
1. p = 5d  
2. d = p + 5
3. d = 5p
Answer:
3. d = 5p
Step-by-step explanation:
As one plate of cookies price is 5 $
The d is expressed as numbers of dollars which are earned. 
Earnings = d = 5 x number of plates sold (p)
therefore
d = 5p