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OpenStudy (anonymous):
-9+-11
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OpenStudy (lgbasallote):
-20
OpenStudy (anonymous):
do i sub
OpenStudy (anonymous):
i got -2 is that right
OpenStudy (anonymous):
Nope. You should add 9 and 11 together and make it negative.
Directrix (directrix):
-9+-11 means (-9) + (-11). Look at a number line and find (-9). Then, move 11 units to the left of (-9). You'll end up at a point with coordinate (- 20).
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