54 Question School administrators wondered how class size affected the average class mark (\%) achieved by students. Using a random sample of classes, the following linear regression line was found: \[ y=98.06-0.55 x \] Using this linear regression line, predict the average class mark of a class with 25 students in it. a) 84.31 b) 91.06 c) 72.51 d) 111.81 e) None of the above

What is the area of a square with sides of length \( 6 ? \)

1- Escribir cada número: a) 37 milésimas.

3. \( \left\{\begin{array}{l}4 y+3 x=8 \\ 8 x-9 y=-77\end{array}\right. \)

53 Pour chacune des suites ci-dessous, déterminer le sens de variation en calculant lá différence \( u_{n+1}-u_{n} \). 1. \( \left(u_{n}\right) \) est définie sur \( \mathbb{N} \) par \( u_{n}=2 n^{2}-n+1 \). 2. \( \left(u_{n}\right) \) est définie sur \( \mathbb{N} \) par \( u_{n}=\frac{1}{2 n+1} \). 3. ( \( \left.u_{n}\right) \) est définie sur \( \mathbb{N} \) par \( u_{0}=1 \) et \( u_{n+1}=u_{n}+2 n+3 \). 4. \( \left(u_{n}\right) \) est définie sur \( \mathbb{N} \) par \( u_{0}=2 \) et \( u_{n+1}=u_{n}-\sqrt{u_{n}^{2}+3} \).

Part 1: Summary of Election Results Briefly describe the outcome of the presidential, congressional, and local elections. Key Results: - Presidential Election: - Senate and House Elections: - Local Elections (if applicable):