Answer:
1,136 calories.
Step-by-step explanation:
1. Considering that there are 16 ounces in one pound, and the question is asking for one pound, I would think that there would only need to be 16 ounces observed.
2. Through calculations of the given number of oz, there are 71 calories per oz. By multiplying that by 16 (the number of oz in a lb), there are a total of 1,136 calories in a lb.
 
        
             
        
        
        
Answer: 60
Step-by-step explanation:
1/3 means 3 packages per 1 pound
3 x 20 + 60
 
        
             
        
        
        
Answer:
x=-27
Step-by-step explanation:
-0.57x+0.27x = 8.1
-0.3x = 8.1
x = -8.1/0.3
x = -27
 
        
                    
             
        
        
        
Answer:
B. A cow of 5 years is predicted to produce 5.5 more gallons per week. 
Step-by-step explanation:
Let  , where
, where  is the age of the dairy cow, measured in years, and
 is the age of the dairy cow, measured in years, and  is the predicted milk production, measured in gallons per week.
 is the predicted milk production, measured in gallons per week.
Besides, we consider  and
 and  , such that
, such that  , we define the difference between predicted milk productions (
, we define the difference between predicted milk productions ( ) below:
) below:
 (1)
 (1)
If we know that  and
 and  , then the difference between predicted milk productions is:
, then the difference between predicted milk productions is:
 
 

That is, a cow of 5 years is predicted to produce 5.5 more gallons per week than a cow of 10 years. Hence, the right answer is B.