Write two expressions where solution is 19

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

The verbal translation for the difference of m and 7 increased by 15

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