ндрей получил задание к следующему уроку литературы прочитать повесть. В первый ень он прочитал 20\% всех страниц и ещё 2 страницы. Во второй день - \( 50 \% \) оставшихся траниц и ещё 1 страницу. В третий - \( 25 \% \) остатка и ещё 3 страницы. Последние 18 этраниц он прочитал в четвёртый день. Сколько всего страниц прочитал Андрей?

a) \( 2 / 6=9 / x \) b) \( 1 / 3=x / 12 \) c) \( x / 10=6 / 5 \) d) \( \delta / x=2 / 15 \)

Greg drove at a constant speed in a rainstorm for 280 miles. He took a break, and the rain stopped He then drove 264 miles at a speed that was 9 miles per hour faster than his previous speed. If he drove for 14 hours, find the car's speed for each part of the trip. The rate of the car in the rain was 35 mph . The rate of the car without the rain was \( \square \mathrm{mph} \).

2. Expand and simplify \( \begin{array}{ll}\text { a. } 2(x+3) & \text { b. } \quad x\left(x^{2}-3 x\right) \\ \text { c. } \quad(x+7)(x-5) & \text { d. } \quad(x-3)^{2}\end{array} \)

The number of incarcerated adults N (measured in thousands) in a certain country can be approximated by the equation \( \mathrm{N}=-2.8 \mathrm{x}^{2}+72.4 \mathrm{x}+1914 \), where x is the number of years since 2000. In 2012 , the number of incarcerated adults peaked. How many adults were incarcerated in that year? There were \( \square \) incarcerated adults in 2012.

4. \( 4 x-2 x+2=2 x-2-2 x \)