What is –4 • 6 • (–9)?

a.
–216

b.
216

c.
–90

d.
90

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.

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

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?