5(3x-4)+4=144is this answer -8 or -6?

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

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