8x - 4(2x-3y)+1/2(6x-10y)

Evaluate the following expression 1/3^2

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

W-16=-12 solve each one step equation plz