Stack P R with bar on top is five feet long. If stack P Q with bar on top equals left parenthesis 15 x minus 2 right parenthesis and stack Q R with bar on top equals left parenthesis 5 x plus 3 right parenthesis, then is Q the midpoint of line PR? Justify your answer HELP ME PLEASE URGENT

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?

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Kai walked one and two-thirds of a mile on saturday and four and one-sixth of a mile on sunday. how many miles did kai walk?