Answer:
336.49
Step-by-step explanation:
Multiply 87.4 times 3.85 to find your answer. 
 
        
                    
             
        
        
        
Answer: 1 and 2/3
Step-by-step explanation:
Imagine 3 1/3 as if it’s in parenthesis as (3 + 1/3)
Subtract three from five.
You should get two.
Then you subtract the last 1/3 from that two.
There are three thirds in one digit. 
Therefore, two thirds are left over, plus that last whole digit.
You are left with one and one third.
 
        
             
        
        
        
Answer: Total cost is $1.75
Explanation:
Since we have given that 
Number of postcards bought by Doug's family= 7
Cost of each postcard including tax = $0.25
Total cost is given by

Now, we want to show this in number line :
On the number line put all the number with a difference of 0.25 and run the number line seven times and we get the answer.
Each step is of length 0.25 and there are 7 jumps to reach required answer.
So, after 7 jumps we reach at 1.75 which is the required answer.
Hence total cost is $1.75
 
        
             
        
        
        
Marcus made a mistake in Step 2. 5/2.5 is 2 not 3.
-11 -(-42) A double negative makes a positive 
-11 + 42
31
        
             
        
        
        
The answer is to what is 5/2 divided by 1/4 is 10