\( 1,1,-3,+5,-7,9 \ldots \ldots a_{8} \) Find \( a_{7}=?, a_{8}=? \)

\( 1 \leftarrow \quad \begin{array}{l}\text { Use properties of loganithms to condense the logarithmic expression below. Write the expression as a single logarithm } \\ \text { whose coefficient is } 1 \text {. Where possible, evaluate logarithmic expressions. } \\ 6 \ln x+3 \ln y-4 \ln z\end{array} \) \( 6 \ln x+3 \ln y-4 \ln z=\square \)

a) Vis at \( \sqrt{12} \) kan omforms til \( 2 \sqrt{3} \)

Use common logarithms or natural logarithms and a calculator to evaluate the following. \( \log _{15} 89.5 \) Use the change-of-base property to rewrite the given expression in terms of natural logarithms or common logarithms. \( \log _{15} 89.5=\square \) (Do not evaluate.) Evaluate the expression. log \( { }_{15} 89.5 \approx \square \) (Type an integer or a decimal. Do not round until the final answer. Then round to four decimal places as needed.)

Find the outer measure of \( x \) for \( \{-5 \leq x \leq 3\} \cup\{-2 \leq x<7\} \)

Find the slope of the line passing through the given points. (If an answer is undefined, enter UNDEFINED.) \[ (1,7) \text { and }(2,12) \]