Question

Anyone to walk me through?
The perimeter of a rectangle is 38 ft. The length is 3 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.
Write the first equation.
2x+2y=
Write the second equation.
X=y+
What is the length? ( _) ft
What is the width? ( ) ft

Answer 1

ok

Answer 2

so the first equation is the perimeter...

Answer 3

2W+2L = perimeter

Answer 4

the second equation asks about the relationship between L and W

Answer 5

that's talked about in the problem...

Answer 6

so the perimeter states it is 38ft (2w+2L)

Answer 7

L= W+ ?

Answer 8

yes

Answer 9

Length= x, width=y, length longer than width means x=3+y
perimeter = x+x+y+y , which is sum of all sides, using x=3+y in this equation
perimeter = 6+y+y+y+y
p=6+4y

Answer 10

Ok so L=W+38? (Algebraic)?

Answer 11

I am not paying attention to that person, I want to learn. If you're still willing to help me. :)

Answer 12

well if you say length = x or L , then we need to understand length is 3 more than width which is say Y or W

Answer 13

Confused.....

Answer 14

please let me know where are you confused

Answer 15

so L=W+38?
got that far...

Answer 16

I am sry, but L is not equal to w+38

Answer 17

lets say Length = L and widht = w

Answer 18

we know length = 3 more than width, right ? so L=3+W

Answer 19

Perimeter is sum of all sides = length+length+width+width

Answer 20

we have Perimeter =38 ,
38=L+L+W+W, BUT WE KNOW that L=3+W , so put that in the former equation
38=3+W+3+W+W+W,
we have 38= 6+4W

Answer 21

does that help

Answer 22

12.5? length
and 9.5 for width.
Is this correct?

Answer 23

let meknow if there is reason for confusion

Answer 24

I divided the perimeter by 4... 38/4 which gave me 9.5 then I added 3 to that which gave me 12.5 (because it 3 more than) Am I figuring this incorrectly?

Answer 25

no no, we cant divide, we have to move 4 to left side of equation, take away 4 from 38

Answer 26

I really have no idea what I am doing. Sigh.

Answer 27

4 from 38 is 34

Answer 28

I think everyone gave up on helping me. ....

Answer 29

oops there was a typo, take away 6 from 38 and we get 32
32=4w, solve for w and w=8

Answer 30

so
w=8
l=11

Answer 31

great

Answer 32

thank you.