Answer:
8.55 × 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
200 muffins
Step-by-step explanation:
The selling price of each muffin = $2
The cost price of each muffin = $1.40
The price of electricity = $120
If the number of muffins that Jenny sells in a day is x, then, Jenny's total cost in a day is:
120 + (1.4 * x) = 120 + 1.4x
 
and the total sales earnings in a day for x muffins will be:
2 * x = 2x
To break even, the total costs in a day must equal to the total earnings. That is;

Solving this:

She must sell 200 muffins in a day to break even.
 
        
             
        
        
        
Answer:
21.5 Miles or 21 ½ Miles
Step-by-step explanation:
Plug in 7 as m to 3m + ½.
Then, I get 3(7) + ½.
That concludes to 21 + ½
Add the ".5" or "½" at the end 
So, answer is you get is 21.5 of 21 ½
 
        
             
        
        
        
(trying to isolate/get x by itself in the equation)
5(x + 6) = 50      Distributive property   [distribute 5 into (x + 6)]
5x + 30 = 50    Subtraction    [subtract 30 on both sides of the equation]
5x = 20       Division     [divide 5 on both sides]
x = 4
Subtraction then division, the 2nd option
 
        
                    
             
        
        
        
42 inches of wire will cost 168 cents 
Look at the pic to see how to set up the proportion.