a tube containing 3 ounces of toothpaste being used at a rate of 0.15 ounces per day. how much toothpaste will be in the tube after one week?
Mathematics · High School · Tue Nov 03 2020
Answered on
To solve for how much toothpaste will be in the tube after one week, multiply the rate of usage to the number of days in a week and subtract the product from the total amount of toothpaste in the tube. Since there are 7 days a week and the rate of usage is 0.15 ounces per day, this can be expressed as 0.15x where x is the number of days. Now, the problem can be equated as 3 - 0.15x= r where r is the remaining toothpaste after 1 week. Substitute the value of x to solve for r.
> 3 - 0.15x= r
> 3 - 0.15(7)= r
> 3 - 1.05= r
> 1.95 = r
The remaining toothpaste in the tube after one week is 1.95 ounces.