You would add the y's together and then you have your answer and then answer is -2y-4 
        
             
        
        
        
The center of mass is mathematically given as 

<h3>What is the center of mass.?</h3>
Determine the center of mass in one dimension:
Represent the masses at the respective distances.

We calculate the total mass of the system.

Step 03: Calculate the moment of the system.

we calculate the center of mass.

Read more about the center of mass.
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Answer:
2 2/5
Step-by-step explanation:
Given 4/5÷1/3
Multiply 4/5 with the reciprocal of 1/3 as shown;
= 4/5 × 1/(1/3)
= 4/5 × 3/1
= 12/5
= 2 2/5 
The quotient is 2 2/5 
 
        
                    
             
        
        
        
Answer:
10 7/12 hours
Step-by-step explanation:
so we have to multiply 2 2/3 twice since he does that many hours for 2 days. We then have to multiply 1 3/4 three times since he does that many hours for 3 days. Lets first convert 2 2/3 into a mixed fraction. 2 2/3 = 3 times 2 =6 +2=8 over 3. 1 3/4=4 times 1=4+3=7 over 4. 8/3 times 2 equals 16/3 which eqials 
5 1/3 hours. 7/4 times 3 equals to 21/4 which equals to 5 1/4. Lets now add 
5 1/3 and 5 1/4. 5+5=10 but the fractions are not the same. Therefore, we need to make it to a common denominator. 4 times 3 equals to 12 so 4/12 plus 3/12 equals 7/12. Final answer equals to 10 7/12.