1
00:00:00,000 --> 00:00:00,790


2
00:00:00,790 --> 00:00:05,520
Write a polynomial to express the total value of p $20

3
00:00:05,519 --> 00:00:15,109
bills, q $10 bills, and r $5 bills.

4
00:00:15,109 --> 00:00:18,179
So what's the value of p $20 bills?

5
00:00:18,179 --> 00:00:22,089
Well if I have p $20 bills, the value of each of those

6
00:00:22,089 --> 00:00:23,890
dollar bills is going to be $20.

7
00:00:23,890 --> 00:00:28,589
So the value all p of them is going to be 20p.

8
00:00:28,589 --> 00:00:32,298
If I have one $20 bill, it's $20.

9
00:00:32,298 --> 00:00:36,170
If I have three $20 bills, if p is 3, it's going to be $60.

10
00:00:36,170 --> 00:00:37,649
Actually, let me do that in the same color as

11
00:00:37,649 --> 00:00:38,420
I underlined it.

12
00:00:38,420 --> 00:00:39,630
I underlined it in yellow.

13
00:00:39,630 --> 00:00:42,040
So let me do the p $20 bills.

14
00:00:42,039 --> 00:00:45,640
So 20p is the p $20 bills.

15
00:00:45,640 --> 00:00:49,100
Then you have your q $10 bills.

16
00:00:49,100 --> 00:00:50,259
So what's the value of those?

17
00:00:50,259 --> 00:00:52,489
Well it's going to be 10q.

18
00:00:52,490 --> 00:00:55,100
If I have one $10 bill, it's worth $10.

19
00:00:55,100 --> 00:00:57,410
If I have ten $10 bills, if q is 10, this is going to be

20
00:00:57,409 --> 00:00:59,559
worth 10 times 10. $100.

21
00:00:59,560 --> 00:01:02,480
And then finally you have your r $5 bills, which are going to

22
00:01:02,479 --> 00:01:04,829
be worth 5r dollars.

23
00:01:04,829 --> 00:01:07,120
One $5 bill, worth $5.

24
00:01:07,120 --> 00:01:09,790
Two $5 bills, worth $10.

25
00:01:09,790 --> 00:01:10,609
And we're done.

26
00:01:10,609 --> 00:01:13,239
We've expressed it as a polynomial.

27
00:01:13,239 --> 00:01:16,089
Polynomial just means that we have multiple terms here and

28
00:01:16,090 --> 00:01:18,760
this is three terms. We could even call it a trinomial.

29
00:01:18,760 --> 00:01:22,700
Polynomial is a more general term for more than one term.

30
00:01:22,700 --> 00:01:23,332