Simplify the expression 9x+5(4x−3y)

29x  -15y  

Step-by-step explanation:

9x + 5(4x -3y)    First apply the distributive property

9x + 20x - 15y        Now combine like terms

(9x + 20x) - 15y    

29x  -15y

Given that The data to represent average test scores for a class of 16 students includes an outlier value of 78.

We can find sum of all 16 test scores = 84(16) = 1344

Outlier found = 78

If outlier is removed new sum = 1344-78 = 1266

Number of entries without outlier = 15

New average = 1266/12 =84.4

We find that average of new data increases.

Also whenever we remove outlier std deviation also would be reduced.

Step-by-step explanation: