Spencer is playing his favorite board game, Road Race, with some friends. Players take turns picking cards that tell them how many spaces to move forward or backward. On his first turn, Spencer picked a 7 and moved forward 7 spaces. If Spencer picks a -2 on his next turn, what should he do? move forward 2 spaces move backward 2 spaces do not move

a) \( \frac{8}{\sqrt[3]{2}}= \)

Reduce las siguientex expresiones aligebraleasi i) \( m+2 m=3 m \) b) \( a+2 a+9=42 a \) e) \( m^{2}-2 m^{2}-7 m^{2}=-8 m^{2} \) d) \( 6 x^{2} y^{2}-12 x^{2} y^{2}+x^{2} y^{2}=-5 x^{2} y^{2} \) e) \( 3 a-2 b-5 b+9 a=7 b \) f) \( a^{2}+b^{2}-2 b^{2}-3 a^{2}-a^{2}+b^{2}=-3 a^{2} \) g) \( x^{2} y z+3 x y^{2} z-2 x y^{2} z-2 x^{2} y z=-x^{2} y 2+x \) h) \( 2 x-6 y-2 x-3 y-5 y=14 y \) i) \( 15 a+13 a-12 b-11 a-4 b-b=17 a-17 \) j) \( a+a^{2}+a^{3}+a^{4}-a-2 a^{2}+3 a^{3}-4 a^{4} \) k) \( 1+x+x y-2+2 x-3 x y-3+2 x y-3 x \)

\begin{tabular}{ll}36 & 18. \( \quad\left\{\begin{array}{l}3 x+2 y=7 \\ 4 x-3 y=-2\end{array}\right. \) \\ \hline\end{tabular}

S. If \( x=\sqrt{2}+10, y=\sqrt{2}-10 \), then \( (x+y)^{2}=\ldots \cdots \) \( \begin{array}{llll}\text { (a) } 4 & \text { (b) } 6 & \text { (c) } 8 & \text { (d) } 4 \sqrt{2}\end{array} \)

2 Se toman al azar 5 cursos de una Escuela y en cada uno de ellos se obtiene la varianza de las edades. 5 las sigulentes alternativas corresponden a esas varianzas. ¿Cuall de ellas evidencia un curso con edades más homogéneas?