Use the properties of logarithms to condense the following expression as much as possible, writing the answer as a single term with a coefficient of 1. All exponents should be positive. \[ \ln (9)+2 \ln (x)-7 \ln (y) \]

b) 0,4 L para \( \mathrm{cm}^{3} \)

(5) \( \left\{\begin{array}{l}12 x-16 y=-24 \\ 4 x+8 y=32\end{array}\right. \)

3. \( \left\{\begin{array}{l}4 y+3 x=8 \\ 8 x-9 y=-77\end{array}\right. \)

220 Wie lautet die Gleichung \( y=a(x-11)^{2}+v \) der Parabel mit dem Selheitelpunkt \( S \), die durch den Punkt \( P \) verlluft? \( \begin{array}{llll}\text { i) } S(2 \mid 4), P(-1 \mid 7) & \text { (b) } S(2 \mid 4), P(3 \mid 3) & \text { c) } S(-2 \mid-3), P(0 \mid 0) & \text { d) } S(2 \mid 4), P(-6 \mid-12)\end{array} \)

неук..снительно