Rectangular plot fenced on three sides with 100m of fencing and 500m² area

[travishillier]

Heres the question ... your help is greatly needed and appreciated ...

Markita wants to fence a rectangular plot of land along side the shore of a lake. Only 3 sides must be fenced, since the lake will form the lake will form the fourth side. Markita had 100m of fencing, and she wants the plot of land to have an area of 500m^2 (squared). Find the dimensions of the plot of land, to the nearest tenth of a metre. Expalin and justify your solution.


there's thequestion , lmk what u can do to help me out ... Thx

 

[Wooh]

basically, we know that 2a+b=100, meaning that the 2 sides opposite each other (that are also equal) plus the third side will equal 100 feet of fencing.
We also know that ab=500, as the area of a rectangle is found by multiplying adjacent sides. Solve the system.

 

[cookiemonster]

Gah! Please don't triple post either!

cookiemonster

 

[Ebolamonk3y]

woah now... spamming...