40/3 days, (13.33 days)
Step-by-step explanation:
Set up the equation, 15/20 = 10/x, and then use cross mutiply to solve it. 
10 * 20 = 15x, x = 200/15 = 40/3 
Why?
b/c if each pig eats the same amount of food, then the ratio between the number of pigs and days should remain constant. 
 
        
             
        
        
        
Answer:
If w represented the number of weeks he does his chores, the equations would be:
Miles: 120+10w
Simon:75+15w
 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
Solve. Technically, there are two methods. You can first multiply, or first divide. 
Essentially the question is: 
(5 * 2)/5 
or 
2 * (5/5)
Solve. Remember to follow PEMDAS. First solve the parenthesis, then simplify: 
(5 * 2)/5 = (10)/5 = 2
2 * (5/5) = 2 * 1 = 2
2 is your answer.
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A) The membership cost starts at $23 and it adds $6 every year. The 23 would be your b and the 6 would be your slope, m, in the form y=mx+b.
y=6x+23
This equation means that you're starting at 23 dollars and adding 6 dollars with every x you add.
B) 2009-1995=14 This means that there's 14 years that the cost increased. 14*6=$84 The membership cost increased by anther $84 over the 14 years. You have to add 84 to 23 to find your total=$107. 
C) Set $85 equal to 6x+23
85=6x+23
6x=62
x≈10
10 years later the cost will be $85. 
1995+10=2005