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eroshea
Group Title
a piece of cardboard has an area of 486 cm^2. a square of side 3cm is cut from each corner and an open box is made by turning up the ends and sides if the volume of the box formed is 756cm^3. what are the dimensions of the cardboard?
 one year ago
 one year ago
eroshea Group Title
a piece of cardboard has an area of 486 cm^2. a square of side 3cm is cut from each corner and an open box is made by turning up the ends and sides if the volume of the box formed is 756cm^3. what are the dimensions of the cardboard?
 one year ago
 one year ago

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hartnn Group TitleBest ResponseYou've already chosen the best response.1
drawing a figure will help, could u draw a figure of this ?
 one year ago

eroshea Group TitleBest ResponseYou've already chosen the best response.0
dw:1353637103770:dw
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
dw:1353579949506:dw
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
volume = 3(x6)(y6) = 756
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
can u solve those 2 equations ? xy=486 3(x6)(y6) = 756 ?
 one year ago

eroshea Group TitleBest ResponseYou've already chosen the best response.0
cAN I DO the substitution method?
 one year ago

eroshea Group TitleBest ResponseYou've already chosen the best response.0
x = 486/y then substitute to the second equation
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
try it, if u go wrong, i'll help.... instead substitute xy=486 in 2nd equation
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
u get xy term in 2nd equation
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
and u'll be able to find x+y from 2nd equation...
 one year ago

eroshea Group TitleBest ResponseYou've already chosen the best response.0
18y^2810y+8748 very big numbers >.<
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
y^245y+486
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
if 18y^2810y+8748 is correct... i have not checked that.
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
y^245y+486 =0 is correct can u factor it ?
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
hint : 18*27 = 486
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
y^245y+486 =0 (y18)(y27)=0
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
find y from here, then u also get 2 values of x then dimensions are x,y
 one year ago

eroshea Group TitleBest ResponseYou've already chosen the best response.0
you're a very big help to me my friend. thanks a lot :)
 one year ago
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