Instructions

A question is followed by data in the form of two statements labelled as I and II. You must decide whether the data given in the statements are sufficient to answer the questions.

Question 7

What is the value of $$\frac{x^2}{y^2} + \frac{y^2}{z^2} ?$$
I. $$\left(\frac{x}{y} + \frac{y}{z}\right)^2 = 100$$
II. x = 2z


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