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The perimeter of a rectangle field is 60 meters. Its area is 200 square meters. Find its dimensions.
 one year ago
 one year ago
The perimeter of a rectangle field is 60 meters. Its area is 200 square meters. Find its dimensions.
 one year ago
 one year ago

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countonme123Best ResponseYou've already chosen the best response.1
Please explain each step. I am having trouble here. :(
 one year ago

countonme123Best ResponseYou've already chosen the best response.1
come on guys there has to be at least one nerd here. lol
 one year ago

nenadmatematikaBest ResponseYou've already chosen the best response.1
dw:1340060211664:dw
 one year ago

nenadmatematikaBest ResponseYou've already chosen the best response.1
so you'll have to solve this system. From the second equation b=30a so plug it back into the first equation and you'll get this equation:dw:1340060339958:dw
 one year ago

nenadmatematikaBest ResponseYou've already chosen the best response.1
so your rectangle field has sides a=10 b=20 or a=20 b=10
 one year ago

nenadmatematikaBest ResponseYou've already chosen the best response.1
do you understand this?
 one year ago

countonme123Best ResponseYou've already chosen the best response.1
ah so its that parenthese trick thing again where you multiply them and it equal a complicated equation? I think i get it
 one year ago

nenadmatematikaBest ResponseYou've already chosen the best response.1
haha :D OK...you can think of it in that way...the basics are to know the formulas for area and perimeter of rectangle...then just to combine those two...I hope I helped you :D
 one year ago

countonme123Best ResponseYou've already chosen the best response.1
the only part i dont get is why you changed the 60 to 30
 one year ago

nenadmatematikaBest ResponseYou've already chosen the best response.1
formula for the perimeter is 2(a+b) where a and b are lengths of sides...you have its value 60...so a+b=60/2=30...get it? :D
 one year ago

countonme123Best ResponseYou've already chosen the best response.1
ok got that ok what about the term you added after that?
 one year ago

nenadmatematikaBest ResponseYou've already chosen the best response.1
a+b=30, so you can express one side by using the other side,so a=30b....that's the connection between those two sides...so I plugged back 30b instead of a in the first equation...that's how I got the quadratic equation which gives you the exact solution....
 one year ago

countonme123Best ResponseYou've already chosen the best response.1
hmmm, I still don't get why you added the term a^2
 one year ago

nenadmatematikaBest ResponseYou've already chosen the best response.1
how would you multiply a*(30a)?
 one year ago

countonme123Best ResponseYou've already chosen the best response.1
why would you multiplay it by a? a^2  30a
 one year ago

countonme123Best ResponseYou've already chosen the best response.1
there must be something im missing cause i kinda get you...
 one year ago
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