00:04
Okay, we've got this rectangular picture, and then we've got the frame around it.
00:08
And despite my drawing here, it's supposed to be equal all the way around there.
00:12
So the picture is 20 by 22, and then the frame is x all the way around.
00:18
Okay, so that's how wide it actually is.
00:20
So the first thing is to just write an expression for the area, you know, in terms of x.
00:27
And then the second is going to be to figure out the area when we have a 4 -inch frame around.
00:34
This thing.
00:34
So that'll be the second part that we do.
00:36
All right.
00:37
Well, let's talk about the area.
00:38
We know that for a rectangle, the area is simply the length times the width.
00:43
So what we have to do is really calculate, well, what would this width actually look like? well, it goes x unit across, and then it goes another 22 from there, and then it goes an additional x.
00:54
So i've got x twice, so i would call that guy 2x, and then plus 22.
01:00
That is how wide this thing.
01:04
Is from end of the frame to the end of the frame.
01:08
It is 2x plus 22.
01:11
And it's going to be the same thing up the side, except on the side, it's only 20 in the middle.
01:17
So from the very outside to the very bottom there is going to be 2x plus 20.
01:25
All right.
01:26
And that's my length.
01:28
And then my width is the 2x plus 20.
01:31
All right...