00:01
So a dairy farm has two cows.
00:02
Last month, the cow produced 250 gallons less than twice the amount of milk from cow b.
00:09
Together, the cows produced 1 ,200 gallons of milk.
00:14
How many gallons of milk to cow a produce? round off to two decimal places.
00:19
So you have a plus b, and they both together produce 1 ,200 gallons.
00:30
And then it says, last month, cow a produced.
00:34
250 gallons less than, so 250 gallons less than twice the amount of b.
00:44
Okay.
00:46
So now i'm going to plug this in for a and solve for b.
00:50
So i have 2b minus 250 plus b equals 1 ,200.
00:57
And then i have 3b equals 1200 plus 250, is 1 ,450 .5.
01:08
Divided by three.
01:11
So b equals 483 in one third gallon.
01:22
And which means that, so b is 483 in one third gallon.
01:36
And that means a is 1, 483 .3 .3.
01:38
Say.
01:38
And that's 7 ,000 minus 483 .3.
01:43
Say.
01:45
And that's 7 .5 .5 .000.
01:46
116 .67 gallons.
01:52
And so rounding b off to the nearest two decimal places, 33 gallons.
02:04
Okay, two cars start at the same time from two towns, 792 kilometers apart and meet in nine hours.
02:14
One car can travel 8 kilometers faster than the other car.
02:18
How far did each travel before they meet? so they start the same time from two towns...