An electrician from "Sparks 'r us" charges $40 for a house call plus $25 per hour that she works. The total bill is $140. Write an equation to determine how many hrs she worked?

Aregression was run to determine if there is a relationship between hours of tv watched per day (x) and number of situps a person can do (y). the results of the regression were: y=ax+b a=-0.662 b=30.418 r2=0.703921 r=-0.839

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

How many square centimeters of wrapping paper will be used to wrap the shoe box?