
Norbert W. answered 07/09/16
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Looking at the keyboard, it is possible when writing the question, "=" was typed instead of "+", which would have the shift of that key .Assuming the "=" should be a "+" and using parenthesis the question could be
(-2i + 5j) + (3i + 4j) + (-i/3 + 5j/2)
This simplifies after gathering individual values for i and j:
(-2 + 3 - 1/3)i + (5 + 4 + 5/2)j = (2/3)i + (23/2)j, which is answer C