Given:
The matrix equation is:
To find:
The value of matrix C.
Solution:
Let 
. Then the given equation can be rewritten as
On substituting the values of the matrices, we get
Therefore, the correct option is C.
<span>for finding the value, as follows is the method:
in 15th of march,his bank showing a balance of $56.75.in March 20, it was $87.37 (after 5 days)
$87.37 -$56.75.=$30.62, and $30.62+$5+$13.5=$48.87. Carlos deposited in his account between the March 15 and the March 20 the amount of $48.87. So the answer is the choice B.</span>
Answer: Lines 2 and 4 are perpendicular.
