Question

Find the dimensions of each rectangle. The perimeter is given.

3. P = 460 ft

(I'll draw them when I get an answer.)

Answer 1

@Butterfly16

Answer 2

Well, p=2*Side A +2*Side B (or side 1+side 2+side 3+ side 4). So,

460=2(w+30)+2(w)

Answer 3

I don't get where you get the 2(w+30)+2(w)

Answer 4

Well, perimeter is the sum of all the sides. Here's an example:
In a rectangle, notice how side 1 & 2 are the same length and side 3 &4 are the same. Now, to figure out the perimeter, we'd do:

5+5+3+3=16
Or
2(5)+2(3)=16

Basically, instead of adding them all up, we're just times two sides instead of adding all four sides. So, with your problem, the measurements of side 1 & 2 will be w+30, so we could set it up as w+30+w+30, or we could just do 2(w+30). Does that make sense?

Answer 5

Yes, kinda. But where did you get 5 & 3 for the side lengths? Sorry this is kinda confusing.

Answer 6

Okay, so we have the equation:
460=2(w+30)+2(w)

Just like yesterday, we're going to try and find w. So, we're going to distribute, combine like terms, then get w alone. Do you remember how we were doing it yesterday? :o)

Answer 7

460=2w+60+2w?

Answer 8

460=4w+60?

Answer 9

Bravo!! Now, how do we get that w alone? :o)

Answer 10

-60

Answer 11

Awesome, so what is w going to equal?

Answer 12

100

Answer 13

:D ?

Answer 14

Like the thing is I can do that part where you put them together and stuff, but i don't get the first step we did. Those are confusing.

Answer 15

Perfect! So now that we know the value of w, we know the two sides of w is 100, and then to find the other two we plug 100 in for w in the equation w+30

Answer 16

Yeah (:

Answer 17

Next one?

Answer 18

Do you want me to try and explain that first step? And can you tell me which step exactly that it was? :o) Dont want you confused! :o)