Question

subject: formulas;dont know formulas.
plz help.

The length of a rectangle is 4 inches more than its width, and its perimeter is 34 inches. Find the length and width of the rectangle.



Find the width of the rectangle.

6 in.
6.5 in.
7.5 in.

Answer 1

that's hard

Answer 2

yeah i know math aint my subjec english is

Answer 3

I can sepll good

Answer 4

i can tell

Answer 5

sory I ment spell

Answer 6

Hello there, I can help you with this question. :)

Answer 7

god

Answer 8

thanks abunch

Answer 9

sory iment good

Answer 10

You are welcome. Well, I take it you are completely stuck on this problem, so I will help you. :) PLease allow me a few minutes to scratch this out, okay?

Answer 11

yes ma'am

Answer 12

I love inglish

Answer 13

l*w right

Answer 14

alright

Answer 15

so where does The length of a rectangle is 4 inches more than its width come in

Answer 16

You know what? The thing I was going to have you do would probably be a little more complicated. Okay, let's try something else. You know how rectangles have two long sides that match each other (lengths) and two short sides that match each other (widths)?

Answer 17

yes so do leanth *2 and whith * 2 right

Answer 18

Not necessarily... We're going to use those so we don't have to do so much math. Our perimeter is given as 34 inches. So if we divided that number by four, we'd get...... ?

Answer 19

8.5

Answer 20

do you set it up like l=w+4=34

Answer 21

Sorry, had to feed the dog. :) Okay, perfect. This means that our answer must be less than or equal to 8.5

SO let's get to work at the formula you are stuck on.

To find the width, you will need this formula:

2w + 2l = Perimeter

And we have to substitute the whole "four inches longer than the width" thing into the equation. So if our width is "x" (we don't know what it is yet), we'll have

2w + 2(2x + 4) = 34

as our equation. Does this make sense? I can re-explain if you need me to.

Answer 22

somewhat makes sence

Answer 23

i see it know u can go on

Answer 24

Okay, so the next step is to solve for x, so we can re-write the equation without the 2w.

2(2x + 4) = 34

Can you solve that?

Answer 25

4x+8=34

Answer 26

Perfect! Can you solve that equation, too?

Answer 27

answer is 6.5

Answer 28

You have hit the answer on the nose! Great work! :) As an extension, do you know what the length is, now that you have found the width?

Answer 29

26

Answer 30

idk

Answer 31

thank you so much
how do i give medals

Answer 32

I see why you got 26, because you multiplied 6.5 by 4; but you should have added 4 to 6.5, because the question says the length is four inches longer. :)

Well, to give someone a medal, you click "best response' which is next to their answer.

Answer 33

You are very welcome! :D

Answer 34

thank so much

Answer 35

I am glad to help. So you understand it better now?

Answer 36

yes alot better thanks to you

Answer 37

Great! Well, you have a great day! :)

Answer 38

u 2