trigonometry problem

Preform the indicated operation

U=(-6,7), V=(-1,2), W=(-7,-5)

V-(8W+7U)

what are the coordinates of the answer?

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- December 15th 2010, 04:20 PMilovefootball36Combining vectors.
trigonometry problem

Preform the indicated operation

U=(-6,7), V=(-1,2), W=(-7,-5)

V-(8W+7U)

what are the coordinates of the answer? - December 15th 2010, 04:32 PMdwsmith
What is 8 times w and 7 times u?

- December 15th 2010, 04:33 PMsnowtea
U, V, and W are vectors.

You do vector arithmetic as follows:

(a,b) + (c,d) = (a+c, b+d)

and k(a,b) = (ka, kb)

Example:

8*(-7,5) = (8*-7, 8*5) = (-56, 40)

(-56,40) + (-42, 49) = (-56 + -42, 40 + 49) = (-98, 89)

Can you try to do the problem now?