00:01
Here we're looking for the midpoint of the segment connecting the points negative to 1 and 3 5th negative 4.
00:10
To find the midpoint of a segment, you take x1 plus x sub 2 over 2, y sub 1 plus y sub 2 over 2.
00:26
So it's the average of the x values and the average of the y values.
00:29
So i'm going to go ahead and substitute in at this point.
00:32
My x values are negative 2 and 3 5ths so i get negative 2 plus 3 5th divided by 2 my y values are 1 and negative 4 so i get 1 minus 4 over 2 negative 2 plus 3 5th i'm going to break out to the right hand side here to do this i can't just add them together we need a common denominator my common denominator is going to be 5 my 3 5th is going to stay the same i have a hidden 1 under here here.
01:03
So the question is, what can i multiply by? that's an equivalent fraction of one, but going to get me to five.
01:11
And the answer is five over five, because now five times negative two is negative 10 and five times one is five.
01:20
But if i look at that fraction, negative 10 over five, it's equivalent to negative two, which is perfect.
01:26
An equivalent fraction of one doesn't change our value because multiplying by one, we get the same answer.
01:33
So now i have negative 10 fifths plus three -fifths.
01:38
And when we add fractions together, our denominator states the same.
01:41
And we just look at the top...