Answer:|-20-260|
Explanation:
Tom with above average score of 260, so that will represent 260 in the equation
Note that the average score will be represented with 0
Tamir score is below average of 20 which represents -20 in the equation
To find the difference we need to subtract -20 with 260, -20-260. Which will equal -280
Note it's not possible for tom to have a below average score, so we must add a absolute value to get 280 to make it make sense
So we get the final equation of |-20-260|