00:01
Number 75 says find the dimensions of the box described.
00:05
It says the length is three inches more than the width.
00:09
The width is two inches more than the height.
00:12
So since we talk about width in both cases, we're going to represent the width with w.
00:18
And then it says the length is three inches more.
00:22
So this length here must be w plus three.
00:26
And the height, the width is two inches more than the height.
00:31
If i take two inches away from w, that should give me the height.
00:39
Right.
00:39
So it also gives me the volume.
00:42
It says the volume is 120.
00:45
The volume is 120.
00:53
Okay.
00:54
So we know that when we find the volume of a box, we have to take the length times the width, times the height.
01:01
So this must be equal to these three things multiplied by each other.
01:13
Right.
01:14
So i'm going to begin to simplify the left hand side.
01:16
By multiplying my two binomials by each other.
01:21
W times w gives me w squared...