The price of a gallon of gasoline increased by 5 cents one week, decreased by 3 cents each of the next two weeks, and increased by 9 cents the fourth week. Find the average change in the price of gasolina for the 4 weeks.
14 - 6 = 8
8/4 = ?
thank you. please can you tell me how do you get 14 and 6 please. I want to understand. Thank you
Increase: 5 * 9 = 14
Decrease: 3 * 2 = -6
thank you very much
You are very welcome.
To find the average change in the price of gasoline for the four weeks, we need to calculate the total change and then divide it by the number of weeks.
Let's break down the changes in the price of gasoline week by week:
1st week: Increased by 5 cents
2nd week: Decreased by 3 cents
3rd week: Decreased by 3 cents
4th week: Increased by 9 cents
To calculate the total change, we need to add up all the individual changes for each week:
Total change = increase + decrease + decrease + increase
Total change = 5 cents + (-3 cents) + (-3 cents) + 9 cents
When subtracting a decrease, we use a negative sign to indicate a decrease in the price.
Now, we can calculate the total change:
Total change = 5 cents - 3 cents - 3 cents + 9 cents
Total change = 8 cents
The total change in the price of gasoline for the four weeks is 8 cents.
To find the average change, we divide the total change by the number of weeks, which is 4:
Average change = Total change / Number of weeks
Average change = 8 cents / 4
Calculating the average change:
Average change = 2 cents
Therefore, the average change in the price of gasoline for the four weeks is 2 cents.