Given the function \( f(t)=2 t^{4}-6 t^{3}-8 t^{2} \); its \( f \)-intercept is its \( t \)-intercepts are \( \square \)

15. What is the value of \( x \) and \( y \) in a given two equal ordered pair below: \( \begin{array}{l}2 x+1,3 y+4)=(-4 x-2,5-2 y) \\ x=-1 / 2, y=1 / 5 \\ x=1 / 5, y=1 / 2 \\ x=1 \text { and } y=3 \\ x=-1,0 \text { and } y=5\end{array} \)

if \( f(x)=2(x-2)^{3}+6 \) find \( f^{-1}(2) \)

9. In a mathematical sentence, \( 2 \mathrm{ax}+\mathrm{by}=6 \), what particular symbol is pertaining to a verb? a and b 2 and 6 \( x \) and \( y \) \( = \)

Graph the quadratic function below. Does the following parabola open upwards or downwards? \( y=-3 x^{2}-6 x-3 \)

2. Tobi recruits twice as many students for the project as Erica. Six of the recruits are the same. Which equation describes these facts? (Use \( x \) for Tobi's unique number. Use \( y \) for Erica's unique number.) A \( x+6=2(y+6) \)