Find the indicated quantity. If v= 3i -5j and w= -7i + 4j
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Find the indicated quantity. If v= 3i -5j and w= -7i + 4j

[From: ] [author: ] [Date: 12-04-27] [Hit: ]
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Like it sais above;

Find the indicated quantity. If v= 3i -5j and w= -7i + 4j, find 3v-4w.

I know the answer is 37i -31j I just need how to get the answer and what the steps are.

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We have:
v = 3i - 5j = <3, -5>
w = -7i + 4j = <-7, 4>

Then:
3v - 4w
= 3<3, -5> - 4<-7,4>
= <9, -15> - <-28, 16>
= <37, -31>
= 37i - 37j
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