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1.What is the component form of the vector whose tail is the point  (−3,2) and whose head is the point  (1,−6)?

i got〈 4, −8 〉

 

2.  What is the vector that results from transforming  a⃗   by the transformation matrix?

 

a⃗ =[5 ,]                         [7        -6]

       [ −3] and  B=[3       −4]

for this one I got   〈 53,27〉

 

3.  

What is the component form of resultant of 4b⃗ −5a⃗ ?

a⃗ =⟨1,−3⟩

b⃗ =⟨−1,2⟩

 

My answer was  

〈 −9,23〉

 

Thanks!!!

 May 15, 2020
 #1
avatar+111326 
+1

The first  is correct

 

Second  one....

[ 7   - 6  ]   [ 5 ]    =        [ (7)(5)  + (-6)(-3)  ]    =       [ 53 ]     

[ 3   - 4  ]   [ -3]               [ (3)(5) + (-4)(-3)  ]             [ 27 ]

 

 

Sorry....don't know the last one......

 

 

 

cool cool cool

 May 15, 2020

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