What is a simpler form of 6x(2x3 + 7x)?

Horace's speedometer reads 60 miles per hour, but during a road test he finds that he was actually driving 58 mph. what is the percent error in horaces speedometer?

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

What is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079