Answer:
x = 16
Step-by-step explanation:
Let the unknown number be x.
Translating the word problem into an algebraic expression, we have;
4x + 9 = 73
4x = 73 - 9
4x = 64
x = 64/4
x = 16
Therefore, the unknown number is 16.
 
        
             
        
        
        
Step 1: Add up all the scores.
Step 2: count the number of  scores.
step 3: divide the sum of the scores by the number of scores themselves.
step 4: The answer is 26 points.
        
             
        
        
        
95-55 is the simpliest form
        
             
        
        
        
Answer:
1 hour and 20 minutes
Step-by-step explanation:
6mph= 6 miles every hour
1 mile = 10 minutes 
2 miles = 20 minutes
8 miles = 1 hour and 20 minutes