W 17) Find the vertex for \( y=x^{2}+1 \). Use \( \left(\frac{-b}{2 a}, \frac{-\left(b^{2}-4 a c\right)}{4 a}\right) \) from the quadratic formula \( x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a} \). \( (0,-1) \) \( (0,0) \) \( (0,1) \) \( (1,0) \)

Question Simplify: \( \sqrt[3]{-125} \) (Enter \( \varnothing \) if your answer is not a real number.)

Question simplify \( \sqrt[3]{-128} \). Express the answer using a positive radicand.

Question Simplify: \( \sqrt{9+16} \) (Enter \( \varnothing \) if your answer is not a real number.)

Question Estimate \( \sqrt{35} \) to two decimal places.

\( 1 \leftarrow \quad \begin{array}{l}\text { Write the first four terms of the recursive sequence. } \\ a_{1}=6, a_{n}=5-a_{n-1} \text { for } n \geq 2\end{array} \) \( a_{1}=\square \) (Type an integer or a simplified fraction.)