WEBVTT
00:00:00.920 --> 00:00:07.000
For a marathon, an athlete practiced on a track that is đť‘š miles long.
00:00:08.000 --> 00:00:16.200
She ran for five laps each on Monday and on Wednesday and four laps on Friday.
00:00:17.360 --> 00:00:21.480
On Sunday, she ran for 18 miles.
00:00:22.400 --> 00:00:30.880
Write an expression in the simplest form that represents the total distance the athlete ran during her practice.
00:00:32.520 --> 00:00:38.640
First of all, from a long worded question like this, we wanna work out what weâ€™re actually looking for.
00:00:39.720 --> 00:00:46.800
And we can see that what weâ€™re trying to look for is actually the total distance that the athlete ran.
00:00:47.800 --> 00:00:54.480
And we want to find this total distance in miles as these are the units that are mentioned within our question.
00:00:55.600 --> 00:00:56.760
Okay, great!
00:00:57.320 --> 00:00:59.560
So letâ€™s look at the information we have.
00:01:00.400 --> 00:01:06.760
We can see that the question tells us how many laps she ran on each day.
00:01:07.760 --> 00:01:11.280
So letâ€™s write these down.
00:01:11.280 --> 00:01:36.800
So we got five laps on Monday and also five laps on Wednesday; be careful not to miss this one out because if you just looked at the numbers, you think it was five, four, and 18, but in fact there are two lots of five laps because it says that she ran for five laps each on Monday and on Wednesday.
00:01:37.400 --> 00:01:39.800
Then, she ran four laps on Friday.
00:01:40.400 --> 00:01:44.120
And then finally, on Sunday, she ran 18 miles.
00:01:45.400 --> 00:01:46.600
Okay, great!
00:01:47.120 --> 00:01:49.880
So weâ€™ve got all the information down.
00:01:50.480 --> 00:01:59.680
So what we can now do is just work out our total number of laps, which is gonna be five plus five plus four which is gonna give us 14 laps.
00:02:00.560 --> 00:02:23.360
Well, if we know that also weâ€™ve got 14 laps, but each lap is worth đť‘š miles, we can show that our total distance travelled in those 14 laps can be represented by 14 đť‘š because itâ€™s 14 multiplied by đť‘š miles.
00:02:24.400 --> 00:02:24.840
Great!
00:02:25.640 --> 00:02:31.240
So we now know the total distance from Monday to Friday.
00:02:31.960 --> 00:02:45.800
Well, now that we know the total distance from Monday to Friday and we know the total distance for Sunday, we can solve the problem and actually write an expression in the simplest form.
00:02:46.480 --> 00:02:59.080
So we can say the total distance the athlete ran during her practice was 14đť‘š plus 18.