Mathematics, 07.07.2019 09:00 bettylou12504
If u = < 5,2> and v= < 4,-3> find 2u +3v a.< -22,6> b.< -22,13> c.< 2,-5> d.< 2,5>
Answers: 1
![\vec{u}=[5,\ 2],\ \vec{v}=[4,\ -3]\\\\2\vec{u}=2[5,\ 2]=[(2)(5),\ (2)(2)]=[10,\ 4]\\\\3\vec{v}=3[4,\ -3]=[(3)(4),\ (3)(-3)]=[12,\ -9]\\\\2\vec{u}+3\vec{v}=[10,\ 4]+[12,\ -9]=[10+12,\ 4+(-9)]=[22,\ -5]](/tpl/images/0061/1845/56197.png)
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If u = < 5,2> and v= < 4,-3> find 2u +3v a.< -22,6> b.< -22,13> c.<...
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