Can some one help me

Question

anonymous · Answer

A rectangular room is twice as long as it is wide, and its perimeter is 54 meters. Find the length of the room.

amistre64 · Answer

how do we calculate the perimeter of a rectangle?

anonymous · Answer

add up all sides

amistre64 · Answer

good  soo

l+l+w+w = 54

but w=2l

what can we do with this?

amistre64 · Answer

or another way to see it,  w = l+l

anonymous · Answer

we dont have the length or width

amistre64 · Answer

we dont need them, we know the relationship between them

amistre64 · Answer

this means that we can replace w by its equivalent l value  and have a 1 term equation to solve

amistre64 · Answer

A rectangular room is twice as long as it is wide,
|dw:1412632873100:dw|

amistre64 · Answer

fine;  l = w+w

amistre64 · Answer

if we know w we know l by the relationship defined

anonymous · Answer

I am trying to find w but dont know how

amistre64 · Answer

w+w+l+l = 54

l = w+w

w+w+w+w+w+w = 54

6w = 54,  what is w?

anonymous · Answer

9 oh i am stupid and l=18

amistre64 · Answer

correct

amistre64 · Answer

the 9 and 18 parts,  not about your competence :)

anonymous · Answer

but where did you get 6

amistre64 · Answer

well,  we know that the sides add up to 54

w+w+l+l = 54

now if we knew an eqauivalent way of writing l, but used ws instead

l = w+w,  so lets just use that instead

amistre64 · Answer

w+w+w+w+w+w = 54

we have 6 ws added up, what is the definition of multiplication?

anonymous · Answer

oh i get it

anonymous · Answer

am going to try to do this one The length of a rectangular garden is 8 feet longer than its width. The garden's perimeter is 208 feet. Find the width of the garden.

amistre64 · Answer

or,  since we know l=w+w,  lets replace the w+w we have with l

l+l+l = 54

3l = 54

anonymous · Answer

im stuck on this The length of a rectangular garden is 8 feet longer than its width. The garden's perimeter is 208 feet. Find the width of the garden.

amistre64 · Answer

define the length for me in terms of width

anonymous · Answer

l=8+w

amistre64 · Answer

good, so lets just add up all the sides

(w)+(w)+(w+8)+(w+8) = 208

amistre64 · Answer

solve for w

anonymous · Answer

18w=208

amistre64 · Answer

w+w+w+w + 16 = 208

4w + 16 = 208
       -16     -16
-------------
4w           =192

4w = 192.  what is w?

anonymous · Answer

48

anonymous · Answer

w=488 l=56  thanks

amistre64 · Answer

48 and 56  yes :)

anonymous · Answer

is it okay if you help me with a couple more?

anonymous · Answer

Carpet sells for $4 per square foot and will cost you $840 to recarpet your room. If your room is 14 feet long, how many feet wide is it?