00:01
All right, so with the walls and nine offices, an office building be painted.
00:05
Each is 10 by 9, an 8 foot ceiling.
00:08
Each office is a 3 foot wide by 7 foot wide doorway and a 3 foot high by 9 by 2 foot wide window.
00:16
So let's draw what our office looks like.
00:24
So just pretend people.
00:28
Just pretend.
00:29
Okay.
00:36
Ah, it's one of the better ones i've ever done.
00:38
All right.
00:38
So what do we have? we've got 10 and 9 and 8.
00:48
Okay.
00:50
And then what else do we have? we have a doorway, which is 3 by 7.
01:06
And we have a window, which is 3 by 2.
01:15
Or if the windows look out or look in.
01:19
That's enough.
01:20
All right.
01:20
So here we go.
01:23
So the area to be painted, we have an 8 by 10, which is this one.
01:32
Okay, but we actually have two of them because there's one opposite.
01:38
And we have this one, which is a 9 by 8.
01:45
There's actually 2 of them because there's one opposite.
01:51
But then we need to subtract the door, which is a 3 by 7, and the window, which is a 3 by 2.
02:04
And we don't have just one of those, my children.
02:08
We have 9 of them.
02:12
So i'm going to do this and multiply everything times a 9.
02:18
So let's grab that handy -dandy count.
02:21
Have one that has parentheses in it because it'll make your laugh a whole lot easier.
02:25
So we do 9 parentheses 8 times 10 times 2 plus 9 times 8 times 2 minus parentheses 3 times 7 plus 3 times 2 in parentheses that gets rid of what you're minusing.
02:52
In parentheses that gets rid of where you're multiplying, and that ain't even close.
03:01
What did i do? maybe it is close.
03:12
8 by 10.
03:17
10 by 8.
03:17
It's two of those.
03:19
Now, there's two of those...