etermine whether the following equation defines \( y \) as a function of \( x \). \( x^{2}+y=121 \) Yes the equation \( x^{2}+y=121 \) define \( y \) as a function of \( x \) ? No

Which expression is equivalent to \( x^{-3} \cdot x^{-3} \cdot x^{2} ? \) A \( x^{-12} \) B \( \frac{1}{x^{4}} \) C \( \frac{1}{x^{-4}} \) D \( x^{18} \)

If \( \frac{x^{y}}{x^{3}}=x^{6} \), what is the value of \( y \) ? A 2 B 3 C 9 D 18

solving the following system \[ \left\{\begin{array}{l}x+y=51 \\ 5 x+10 y=425\end{array}\right. \]

Simplify \( \frac{16 x^{4}}{4 x^{4}} \) \( \begin{array}{ll}\text { A } & 4 \\ \text { B } & 12 \\ \text { C } & 4 x \\ \text { D } & 12 x\end{array} \)

5. What value of? makes the equation true? \( ? \div 5=7 \)