I just need help pleaseee

What is the solution set of the quadratic inequality x^2-5< or equal to 0

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

Write the expression 7x^3-28xy^2 as the product of 3 factors