Algebra word problems

The area of a rectangle is found by multiplying the length by the width: A=lw. A certain rectangle has an area os x^2+7x +12. Factor the trinomial to find the length ad width of the rectagle.

Please read at this site:
http://www.themathpage.com/alg/factoring-trinomials.htm

Then see if the below makes sense.


(x+3) (x+4)

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  1. Three girls paid $100 each, a total of $300, to share a Motel Room. Later, the desk clerk realizing she should have only charged $250, gives the Room Attendant $50 and asks him to return it to the three girls. Unable to divide the money three ways, he decides to give $10 to each girl and pockets the remaining $20. The girls have now paid $90 each or $270 for the room, and the room attendant has $20. What happened to the other $10?

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    posted by Delaney
  2. There is no other $10. The total was $300, the girls got back $10 each, meaning they paid $270 for the room, and the other guy took the last $20, will adds up to the entire $50 refund. The original $300 is all accounted for. $250 is in the cash register. $30 is with the 3 girls, and $20 is with the clerk.

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