Timothy recorded the monthly change in his savings account balance, in dollars, for 8 months.

Month January February March April May June July August
Balance change
($)

−30 −15 55 40 −20 −45 −10 65
What is the average monthly change in Timothy's savings account balance?

Question

Timothy recorded the monthly change in his savings account balance, in dollars, for 8 months.

Month	January	February	March	April	May	June	July	August
Balance change
($)

−30	 −15 	55	40	−20 	−45 	−10 	65
What is the average monthly change in Timothy's savings account balance?

Bones · Answer

What's given in the problem.  
Timothy recorded the monthly change in his savings account balance, in dollars, for 8 months
The monthly changes are -30, -15, 55,40,-20, -45, -10, and 65
How to solve
Calculate the average by summing the changes and dividing by the number of months.
Step 1 …Sum the monthly changes. -30+-15+55+40+-20+-45+-10+65=40
Step 2 …Divide the sum by the number of months (8). 40/8=5
Solution  
The average monthly change in Timothy's savings account balance is $5

Bones · Answer

Hope this helps

MAGABACK · Answer

@bones wrote:

What's given in the problem. Timothy recorded the monthly change in his savings account balance, in dollars, for 8 months The monthly changes are -30, -15, 55,40,-20, -45, -10, and 65 How to solve Calculate the average by summing the changes and dividing by the number of months. Step 1 …Sum the monthly changes. -30+-15+55+40+-20+-45+-10+65=40 Step 2 …Divide the sum by the number of months (8). 40/8=5 Solution The average monthly change in Timothy's savings account balance is $5

dang.