Maura writes an expression equivalent to 8a-(-3-5a)-2a. Her work is shown below 8a-1(-3-5a)-2a
All the steps are shown in the image

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