00:01
Okay, we have junior.
00:02
He put 10 pesos in his piggy bank yesterday.
00:06
So let's call that day zero.
00:09
And he has 10 pesos in his piggy bank.
00:12
And then he's planning to add three pesos and every previous amount that he's saved.
00:18
All right.
00:19
So day one, we're going to add three to that.
00:22
So that would be 13.
00:23
Day two would be 16.
00:28
Again, just adding three each time.
00:30
Since you're going to be adding three each time, you can write a linear equation for this.
00:35
So we could say that y is equal to mx plus b.
00:39
Now m is going to be the rate.
00:41
So that's going to be 3x.
00:43
And then b is your starting amount, which is going to be 10.
00:48
So 3x plus 10.
00:50
So for example, for day three, you would do 3 times 3 plus 10, which is 9 plus 10, which is 19.
01:01
And that makes sense because we have day three here.
01:05
We would add three and that would give us 19.
01:08
Okay, so we have our equation that can help us answer the other questions now.
01:14
So we have y is equal to 3x plus 10.
01:17
And it looks like we have three questions to do.
01:22
Number one, let's call this a.
01:25
It says, how much money will they have after one year, assuming that this year is a leap year.
01:33
Okay, so if it's a leap year, that means there's 366 days.
01:39
So we would have to do y is equal to three times 366 plus 10.
01:46
Now the three times 366, that gives us 1098, and then we add 10 to that...