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Posted by on Sunday, October 25, 2009 at 8:37pm.

P=2l+2w
Solve for l.
Please show me how you got your answer so I will understand how to do these problems. Thank you.

  • Algebra1 - , Sunday, October 25, 2009 at 8:48pm

    P=2l+2w

    Perimeter = 2 * length + 2 * width

    This is how you find the perimeter (distance around) a rectangle.

    Suppose you want to put a border around a room. If the room is 15 feet long and 12 feet wide, then you'd figure the perimeter this way:

    P = 2l + 2w
    P = (2 * 15) + (2 * 12)
    P = 30 + 24
    P = 54

    So -- you'd need 54 feet of the border for the room.

  • Algebra1 - , Sunday, October 25, 2009 at 8:56pm

    thanks!

  • Algebra1 - , Sunday, October 25, 2009 at 8:57pm

    You're welcome.

  • Algebra1 - , Sunday, March 17, 2013 at 12:47pm

    How many gallons of paint is needed to paint a wall whose dimensions are 11 feet by 19 feet with a 8 foot ceiling?

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