okay guys please answer this for me: the length of a rectangle is 6 centimeters more than the width. the area is 216 square centimerters. what are the dementions??? oh and if you could work it out for me too thatd be great!!!!

Question

okay guys please answer this for me: the length of a rectangle is 6 centimeters more than the width. the area is 216 square centimerters. what are the dementions???   oh and if you could work it out for me too thatd be great!!!!

anonymous · Answer

l=6w
area=l*w
   216=6w*w
216=6w^2
divide by 6 
w^2=36
w=6
l=6w=6*6=36

anonymous · Answer

is this right

anonymous · Answer

lemme give you an example:
A=lw
(120cm2) = (3w + 2cm) (w)
120cm2 = 3w2 + 2cm w
-3w2 - 2cm w + 120cm2 = 0
-1(-3w2 - 2cm w + 120cm2) = -1(0)
3w2 + 2cm w - 120cm2 = 0
(3w + 20cm) (w - 6cm) = 0

w - 6 = 0
w = 6cm (width)

l = 3w + 2cm
l = 3(6cm) + 2cm
l =18cm + 2cm
l = 20cm (length)

anonymous · Answer

what is i dont understand any thing whats name this Lesson

anonymous · Answer

i could figure it out but they put some stuff in the example that i dont know where they came from.

anonymous · Answer

it geometry or algebra... i dont know. im homeschooled and this is what i have to do.

anonymous · Answer

okey

anonymous · Answer

ive had like three people look at this and no one could get it. i have to take the test like friday.