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Mathematics 23 Online
OpenStudy (anonymous):

@kayders1997 The room and the hallway shown in the floor plan below have different dimensions but the same area. (drawing in comments) A: write an equation that relates the areas of the rooms. B: find the value of W

OpenStudy (kayders1997):

I can't see all that :(

OpenStudy (kayders1997):

I see 3W and W+ something?

OpenStudy (anonymous):

let me draw it again in a different way

OpenStudy (kayders1997):

Okay

OpenStudy (anonymous):

|dw:1458510645464:dw|

OpenStudy (anonymous):

how about that one?

OpenStudy (kayders1997):

I can see that now :)

OpenStudy (kayders1997):

Okay so first of all what does ahea mean?

OpenStudy (kayders1997):

lol area

OpenStudy (anonymous):

total space?

OpenStudy (kayders1997):

But are you adding subtracting multiplying or dividing?

OpenStudy (anonymous):

Area = Length x Width

OpenStudy (kayders1997):

Good so you will be multiplying the rectangle length and width but when it says the rooms are equal what does that mean?

OpenStudy (anonymous):

if i could hold the hallway i could smoosh it into the exact same shape as the bedroom

OpenStudy (kayders1997):

Yeah kinda yeah you could say that, To me it just means the area of the hallway and bedroom are the same so they are going to equal eachother so we need to set it up so let's start with the hallway what is the length?

OpenStudy (anonymous):

3w

OpenStudy (kayders1997):

Yep and what is its width?

OpenStudy (anonymous):

w-2

OpenStudy (kayders1997):

Yes so you will need to multiply 3w(w-2) does that make sense?

OpenStudy (anonymous):

\[3w ^{2} - 6\] like this?

OpenStudy (kayders1997):

Yes we could do that now we also need to do this to the bedroom too, do you wanna try that and let me know what you get? :)

OpenStudy (anonymous):

\[w ^{2} +1\]

OpenStudy (kayders1997):

Close

OpenStudy (kayders1997):

Oh wait my bad the other one was close also but not quite right

OpenStudy (kayders1997):

3w times -2

OpenStudy (anonymous):

oh yep

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