Question 5 Which of the following best describes a regular polygon? A polygon where all sides and angles are equal. A polygon with at least one reflex angle. A polygon with all angles less than \( 180^{\circ} \). A polygon with three or more sides.

\( \lim _ { x \rightarrow + \infty } ( x ^ { 4 } + 3 x ^ { 2 } - x ( x ^ { 2 } - 1 ) \sqrt { x ^ { 2 } + 9 } ) = \)

d) \( 2 x+7=5-x-13 \)

If you have a sample set of data that looks to be a realization of an inte grated process of order 2, what would you do to the data in order to mod el it? (2 Marks)

uct \( C \cdot\left(A^{T}+B\right) \) where \( A=\left(\begin{array}{cc}-2 & 3 \\ -1 & -5 \\ 1 & 0\end{array}\right), B=\left(\begin{array}{ccc}4 & -7 & 1 \\ -5 & 6 & 2\end{array}\right), \quad C=\left(\begin{array}{ll}1 & 2 \\ 2 & 1 \\ 3 & 3\end{array}\right) \)

Solve the equation. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.) \[ 25 x^{3}-125 x^{2}-25 x+125=0 \] \( x=\square \)