To find the average, you have to add all the numbers up and then divide by the amount of numbers you added together.
Equation: (86+87+91+x)/4=98
Solve for x:
86+87+91+x=98*4
264+x=392
x=392-264
x=128
The fourth number is 128
        
             
        
        
        
Answer:

Step-by-step explanation:
Simplify the expression and you will get this.
hope this helps
 
        
             
        
        
        
Answer:
2/5
Step-by-step explanation:
The experimental probability is 
P (heads) = number of heads/ total tosses
                 = 8/20
                  = 2/5
 
        
             
        
        
        
Answer:
the constant propertianr would be 4!
Step-by-step explanation:
1 times 4 is 4 
2 times 4 is 8 
3 times 4 is 12 
4 times 4 is 16
 
        
             
        
        
        
Answer:
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