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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.

Respuesta :

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.

lilsinger0261

The correct answers are

245 – 4n

49(5) – 4n

(7)(7)(5) – 4n

(7)(7)(5) – (2)(2)n

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