Ice Mountain Ski Resort is Philip's favorite place to go in the winter. This year, his aunt bought him a season pass. Philip used his season pass discount to get \( \$ 13.75 \) off of the price of a new helmet. After the discount, the helmet's price was \( \$ 116.25 \). Let \( h \) represent the original price of the helmet. Which equation models the problem? \( h-13.75=116.25 \) Solve this equation to find the original price of the helmet. \( \$ \$ \)

8. ¿En qué puntos corta la curva \( r(t)=t i+\left(2 t-t^{2}\right) k \) al paraboloide \( z=x^{2}+y^{2} \) Nota: Graficar

Find the average rate of change of the function \( f(x)=-2 x^{2}-2 x+1 \), from \( x=-2 \) to \( x=1 \). Note, the directions are equivalent to "Find the average rate of change over the interval \( [-2,1] \) ". Average rate of change \( =\square \)

3. Soit \( \left(U_{n}\right) \) une suite arithmétique de raison \( r \) et définie sur \( \mathbb{N} \). On a \( U_{20}=3 \) et \( U_{45}=-2 \). Déterminer la raison \( r \) et le premier terme \( U_{0} \) de la suite.

14. \( 2 x^{3}-2=68 \)

What do you do first to find the median of a set of data?