Teacher/User Name: DEMO Name:__________________________
Practice Problems
By Easy Worksheet
Period: ________ Date: ____________

 
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Solve:

1) Is b a linear combination of the columns of matrix A? Why or why not?
A =  









-10 -10 








-2 
15 -18 
, b =  









-10 








-2 
-18 

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2) Is b a linear combination of the columns of matrix A? Why or why not?
A =  









-10 








-19 46 
, b =  









-10 








46 
3) For which values of h will b be a linear combination of a1, a2, and a3?
a1 =  


















12 
a2 =  









-10 








-16 
a3 =  


















-10 
-20 
b =  









-9 








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4) Is b a linear combination of the columns of matrix A? Why or why not?
A =  







-4 -2 






, b =  














-8 

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