Add 9a+8b-a+b and 10a-9b+6a-1b
2 answers:
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Answer:
B. 5 rolls
Step-by-step explanation:
The areas of the room, not including the ceiling, are discriminated as follows:
Longer walls: (6 inches equals one foot)
Shorter walls: (6 inches equals one foot)
Window area:
Door area:
Area that will be effectively covered:
Total area to wallpaper:
Amount of paper needed:
That is, the area of a roll of paper is
Number of rolls needed:
rolls