Question

1. )Let u = <7, -3>, v = <-9, 5>. Find 4u - 3v.
<55, -27>
<1, 3>
<16, 12>
<-8, -6>

2.)Let u = <-8, -9>. Find 7u.
<-56, 63>
<-56, -63>
<56, -63>
<56, 63>

Answer 1

Multiply each component of u and v by the coefficients in front of the vectors (4 for u, -3 for v, 7 for u in the second problem), then add the results (for the first problem).

Answer 2

taylor has it right

Answer 3

@BTaylor is it <1, 3> please help

Answer 4

\(Example:\)
u=<2,3>
v=<4,5>
2u-3v
= 2<2,3>-3<4,5>
=<4,6>+<-12,-15>
=<-8,-9>