Posted by **Rachel** on Monday, September 17, 2012 at 3:08pm.

Find the coordinate of the midpoint of a segment with the endpoints at –9 and 6.

A.1.5

B.–1.5

C.2

D.–3

- Geometry -
**Steve**, Monday, September 17, 2012 at 3:37pm
the midpoint is halfway between the two values.

The difference between -9 and 6 is 15. (That is, 6 - (-9)) Half that difference is 15/2. So, add half the difference to the smaller value:

-9 + 15/2 = -3/2

or, subtract half the difference from the larger value:

6 - 15/2 = -3/2

Or (and this is a much better and simpler way), a value halfway between two other values, a and b, is their average: (a+b)/2

(-9+6)/2 = -3/2

So, choice B is correct.

## Answer this Question

## Related Questions

- geometry - if a pointis onthe perpendicular bisector of a segment,then it is:A. ...
- Geometry - Find the coordinates of the midpoint of a segment having the given ...
- Geometry - 11. PB is a line segment on a number line it has endpoints at -2 and ...
- Geometry - Line pb is a line segment on a number line. It has endpoints at -2 ...
- geometry - find the midpoint M of the segment with endpoints[1,10] and [-13,-6].
- Geometry - Find the midpoint of the segment with the given endpoints. M(–2, 1) ...
- geometry - Find the midpoint of the segment with endpoints 8, 3and 2, 12 .
- geometry - The coordinate of the midpoint of segment AB is (-3, 2). Find the ...
- geometry - I was assiged to a 20question assigment and Im having troubles with ...
- Geometry - Find the coordinates of the midpoint of the segment whose endpoints ...

More Related Questions