While on a tour in Greece, Jennifer saw that the temperature was \( 28^{\circ} \) Celsius. Solve for \( F \) in the formula \( C=\frac{5}{9}(F-32) \) and use it to find the Fahrenheit temperature. (Round your answer to one decimal place if necessary.)

Mr. Hamilon gave out 15 coupons per hour at the appliance show. After 2 days at the show, working 14 hours total, how many coupons did many distribute?

Actividad 2 Determina la derivada de las siguientes funciones usando la definición \( y \) determina el valor deys pendiente de la recta tangente a la curva en el punto \( x=2 \) \( f(x)=2 x+5 \)

What value added to \( x^{2}+6 x \) would complete the square? \( \begin{array}{l}-3 \\ 3 \\ 9 \\ -9\end{array} \)

4. Gegeben sind die Funktionen \( f_{a} \) mit \( f_{a}(x)=x^{2}+a x+a, a \in \mathbb{R} \). a) Zeichnen Sie die Graphen für \( a=-1, a=0 \) und \( a=2 \) mit einem Rechner. b) Berechnen Sie den Wert von \( a \), für den der Graph von \( f_{a} \) seinen Tiefpunkt an der Stelle \( x=2,5 \) hat.

Use the quadratic formula to solve the equation \( 3 x^{2}-2 x+6=0 \) \[ \begin{array}{l}x=\frac{1 \pm i \sqrt{17}}{3} \\ x=\frac{-1 \pm \sqrt{19}}{3} \\ x=\frac{1 \pm \sqrt{19}}{3} \\ x=\frac{-1 \pm i \sqrt{17}}{3}\end{array} \]