Five notebooks and seven pens cost 13.50, what is the cost of a notebook ?

This is so hard and it’s for a test

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

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