Sin (a+b) = sin a cos b- cos a sin b for all values of a and b. true or false?

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

Can you me find the slope! (30 points)

Need showing work for this problem 56.25 ×25.80