Determine whether the following equation defines \( y \) as a function of \( x \). \[ \begin{array}{l}x^{2}+y^{2}=121 \\ \text { Yes noes the equation } x^{2}+y^{2}=121 \text { define } y \text { as a function of } x \text { ? } \\ \text { No }\end{array} \]

Determine whether the following equation defines \( y \) as a function of \( x \). \( x^{2}+y^{2}=16 \) Does the equation \( x^{2}+y^{2}=16 \) define \( y \) as a function of \( x \) ? Nos

\( \left. \begin{array} { l }{ - ( \frac { 2 } { 5 } ) ^ { 2 } = \square } \\ { \frac { 4 ^ { 3 } } { 5 } = \square } \end{array} \right. \)

If \( f(x)=6^{7-x}+1 \), what is the value of \( f(2) \), to the nearest ten-thousandth (if necessary)?

Identify the greatest common factor of \( 45 x y z \) and \( 27 c x y \).

Fill in the missing values to make the equations true. (a) \( \log _{5} 3+\log _{5} 4=\log _{5} \square \) (b) \( \log _{8} 11-\log _{8} \square=\log _{8} \frac{11}{5} \) (c) \( 2 \log _{8} 5=\log _{8} \square \)