A skier takes a lift to the top of a Black Diamond mountain with a height of 1,700 feet. Every minute the skier travels down the mountain, his altitude is 500 feet less.

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

Which of the following contains a variable?

Factor the polynomial. b^2 + 4b + 4