6. Al resolver el sistema \( \left\{\begin{array}{l}5 x+6 y=20 \\ 4 x-3 y=-23\end{array}\right. \) \( \begin{array}{rlrl}5 x . x=2 & \text { b. } x=-2 & \text { c. } x=5 & \text { d. } x=-5 \\ y=5 & y=5 & y=-2 & y=2\end{array} \)

6) \( \frac{1}{x-2}=2 \)

a) \( \log _{2} x=1-x \);

e) \( (3 x+2) \cdot\left(x^{3}-2 x^{2}+1\right)= \)

Suppose the linear regression line \( y=3.009 x \) - 77.131 predicts a pizza parlor's profits based on the number of pizzas sold. If \( x \) represents the number of pizzas sold, and \( y \) represents the pizza partor's profits in dollars, about how much can the plizza parlor expect in profits if it sells 275 pizzas? A. \( \$ 750 \) B. \( \$ 900 \) C. \( \$ 825 \) D. \( \$ 675 \)

3) \( Y+\left[\begin{array}{l}-1 \\ -6\end{array}\right]=\left[\begin{array}{c}10 \\ -14\end{array}\right] \)