Question

The floor of a shed has an area of 88 square feet. The floor is in the shape of a rectangle whose length is 5 feet less than twice the width. Find the length and the width of the floor of the shed. ??????

Answer 1

how do you find the area of a rectangle?

Answer 2

l*w

Answer 3

yes
and now how can you say what the length is here using only the width?

Answer 4

what number is 5 less than twice another number?
use W for the other number

Answer 5

88=2w+(l-5)

Answer 6

i mean times (l-5)

Answer 7

close, but we need to get rid of the L...
what is L? only using W and numbers and +-*/ ?

Answer 8

im not sure what your saying

Answer 9

5 less than twice W

Answer 10

how can you express that for algrebra?

Answer 11

2w-5

Answer 12

exactly

Answer 13

so that is the length
and Area = Width * Length so...

Answer 14

you know the Area, we are using W for the width, and you know the Length
so plug them in and solve for W

Answer 15

ok so 88=W*2W-5

Answer 16

yes, but be careful here... you need parentheses

Answer 17

area = (Length)(Width)

Answer 18

88 = W (2W - 5)

Answer 19

ok distribute?

Answer 20

yes

Answer 21

2w^2 - 5w - 88 = 0
solve for W and remember that L = 2W - 5

Answer 22

ok so then i get -11/2 and 8... well 11*8 equals 88 but the

Answer 23

then it doesnt match and idk im lost

Answer 24

forget the negative answer... go with the 8

Answer 25

the width is 8 so the length is 2(8)-5