Write an equivalent expression in standard form for the following polynomial: 5x(-4x+3x^2-2)+8(15+9z+4x^2) Please answer fastly.

Can you simplify 4/7? 24 points will be awarded!

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

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