Question

Help!
Find 3U + 2V given the vectors U=-i + 4j and V = 2i - 3j

Answer 1

Can you find 3U first?

Answer 2

No :/ i just started my trig class this week and im conpletely lost!

Answer 3

Okay there are two things you need to learn:
1. Scalar multiplication (multiplying a vector by a scalar (normal number))
2. Vector addition (adding two vectors)

Answer 4

For scalar multiplication:
3U = 3(-i + 4j)

You just have to use the distributive property.

Answer 5

3U = -3i+14j

Answer 6

Does that make sense?

Answer 7

Ooh i got thatt

Answer 8

Now can you do 2V?