Fron past experience a professor knows the test crcere of a student taking her final evamnation is a randon varrable with moun 75 and a varionce af 25 . Use Chebyshers ineguality to determine the lower bourd for the probability that a sudent will vcoro between 63 and 87 .

Solve the equation and check your solution. (If there is no solution, enter NO SOLUTION.) \[ \frac{2}{3 x+1}-\frac{27 x}{3 x-1}=-9 \] \( x=\square \)

20) Solve the inequality \( |x-4|<2 \mid 3 x+1 \) \( \begin{array}{ll}\text { (a) } x>-\frac{6}{5}, x>\frac{2}{7} & \text { (b) } x<-\frac{6}{5}, x<\frac{2}{7} \\ \text { (c) } x>-\frac{6}{5}, x<\frac{2}{7} & \text { (d) } x<-\frac{6}{5}, x>\frac{2}{7}\end{array} \)

Chief Sitting Bull and Colonel George Custer led the opposing forces at the Battle of the Little Bighorn. What was the result? Sitting Bull and all of his men were killed. The battle was a standoff. Custer and all of his men were killed.

1) \( \sqrt{72}=6 \sqrt{2} \)

6. Задание 5 Найдите корень уравнения \( \sqrt{-32-x}=2 \).