Instructions

A question isfollowed bydataintheform of two statements labelled as I and II. You must decide whether the data given in the Statements are sufficient to answerthe questions.

Question 15

For real numbers a and b, what is the value of 7a + 4b?
I. $$ab \neq 0$$
II. $$a^2 + b^2 = 0$$


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