Posted by **Mary** on Friday, November 21, 2008 at 5:45am.

what is an expression of x(line cross) involving r(line),s(line) and t(line).

answer: 3r(line)-s(line)+t(line)

In the drawing there are 3r's, -s, t,and x. All vectors are going in the same direction. is the answer correct?

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