Answer:
21
Step-by-step explanation:
Remember that the centroid splits the 3 medians of a triangle into a ratio of 1:2
Since TS < TN, TS = 42/2 = 21
 
        
             
        
        
        
Answer:
10, and 4. 
Step-by-step explanation:
39+48=87
87-13=74
74 divided by 7= 10 R4
Greatest amount of bricks= 10
Leftovers= 4.
 
        
             
        
        
        
Answer: 16.5 hours 
Step-by-step explanation:
distance=rate*time
132=8*x
Divide by 8 on both sides
x=16.5