Tommy buys a football for $20 plus an 8% tax. John buys a helmet for $25 plus an 8% tax. What is the difference in the amount Tommy and John paid, including tax.

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

3x + 4y = 5 x- 3y = -7 solve by substitution

Sioux co. replaced the roof on its existing building, therefore increasing the building's life by 10 years. the cost of the roof is considered a(n):