How many inches in a mile

Figure abcd is a parallelogram. if point c lies on the line x = 2, what is the y-value of point c?

Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?