Posted by **JOE** on Wednesday, February 10, 2010 at 8:33pm.

On the xy-coordinate plane, point O is the origin. Suppose vector OE=(3,8) and vector OF=(-2,-4). What ordered pair represents vector EF?

I tried graphing them but they don't even end up in the same quadrant.

Not sure what to do..

- MATH -
**Reiny**, Wednesday, February 10, 2010 at 10:16pm
if v(OE) = (3,8), then v(EO) = (-3,-8)

so v(EF) = v(EO) + v(OF)

= (-3,-8) + (-2,-4) = (-5,-12)

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