Karry ran 4.9 miles more than Tricia. I determined the difference but subtracting the miles to see how many more karry ran.<span />
        
                    
             
        
        
        
Answer:
The mean of the combined group is 76.67 ≈ 77
Step-by-step explanation:
- The sum of the grades in Tom's group is 20×70 = 1400
- The sum of grades in Alice's group is 10×90=900
- The sum of gradees in the combined group is =1400+900=2300
- Then the mean grade of the combined group is  
where 
- 2300 is the sum of the all grades in the combined group
- 30 is the total number of people in the group
 
        
             
        
        
        
Answer:
OOO
OOO
OO
Step-by-step explanation:
Where OOO is == 1.
OO is 2/3 of OOO.