91 minus what number gets me to -293

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

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 value of y will make the inequality y< -1 false?