9 May, 17:27

# Peter is going to put up 5 walls in the tree house. each wall will be 7 feet high and 7 feet across. he wants to leave room for windows that measure 2 feet by 2 feet. which algebraic expressions will give the total square feet of lumber he will need for the walls if n represents the number of windows he puts in? choose all that apply.

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Answers (2)
1. 9 May, 17:36
0
The correct answers are

245 - 4n

49 (5) - 4n

(7) (7) (5) - 4n

(7) (7) (5) - (2) (2) n
2. 9 May, 17:57
0
To find the amount of lumber Peter will need, you will subtract the amount of space needed for the windows from the total area of the 5 walls.

Area of all 5 walls - area of the windows.

5 groups of 49 square feet - n groups of 4 square feet.

5 (7 x 7) - n (2 x 2)

245 - 4n would be the simplified expression representing the amount of lumber needed.
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