Explanation: 1.) Find the area of the wall: 8 feet x 9 feet = 72 square feet
2.) To find out how many square feet of wallpaper he had at first, add the area of the wall to the wallpaper he has left: 72 square feet + 27 square feet = 99 ft2
SOMEBODY CORRECT ME IF IM WRONG And if I am right (pls say if my answer was right after this) Mark me brainliest tysm!
Multiply the first equation by 1.5, to get: Subtract the second equation from this: Substituting into the first equation: Therefore, it takes 1/12 minute to print a black-and-white page, and 1/8 minute to print a colored page.