If the system below were written as a matrix equation, by which matrix could you multiply both sides to obtain a solution?

1 answer:

3 0

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Below are the choices:

A.
[8 -6] 
[-5 4] 
B. 
[4 -3] 
[-2.5 2] 
C. 
[-4 5] 
[6 -8] 
D. 
[-2 2.5] 
[3 -4]

B because it is the inverse of
(4 6) 
(5 8) 

Check 
(4.0 -3)(4 6) = (1 0) 
(-2.5 2)(5 8) = (0 1)

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$\bf 2log(x-3)+1=5\iff 2log_{10}(x-3)+1=5\\\\\\ 2log_{10}(x-3)=4
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