Answer:
x = 66
Step-by-step explanation:
For a set of N numbers:
{x₁, x₂, ..., xₙ}
The mean can be calculated as:

In this case we have the data set:
{98, 122, 104, 115, 107, x}
And I assume that we want to have the mean = 102.
So we have a set of 6 numbers, the mean of this set will be:

We need to solve this equation for x.
If we multiply both sides by 6, we get:
(98 + 122 + 104 + 115 + 107 + x) = 102*6 = 612
546 + x = 612
x = 612 - 546 = 66
x = 66
 
 
        
             
        
        
        
Answer:
6x-2
Step-by-step explanation:
-4x(1-3)-(2x+2)
= 4x+12x-2x-2
6x-2
(simplify)
 
        
             
        
        
        
Answer:
144 
Step-by-step explanation:
120 x 1.20 = 144 
.20 is 20% and adding the 1 adds it to the original value
 
        
             
        
        
        
He sold 17 t-shirts. Subtract 40 from 125 and then divide 5 into 85. Your answer is 17.
        
             
        
        
        
So you make them into an improper fraction with a common denominator. so it would be 18/4 - 7/4, and it equals 11/4, or 2 & 3/4!