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Mathematics 9 Online
OpenStudy (anonymous):

are these right? please help :) thanks

Directrix (directrix):

#1 should be 4 (as you have it) but wrote as 4/4. In ratio form, it is 4/1.

OpenStudy (anonymous):

is that all?

Directrix (directrix):

#11 is correct and I think #12 is, too. Someone else needs to check #12 for correctness.

OpenStudy (anonymous):

Looks good to me. As long as you translated your vector across space properly which it looks like you did then its right

OpenStudy (anonymous):

how is vector AB = 8,-4?

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