Rút gọn biểu thức sau (3\ +\ \frac{\frac{9}{2}}{\sqrt5}\ )\times\ ( 2-\sqrt5 )n + (3\ -\ \frac{\frac{9}{2}}{\sqrt5}) \times(2+\sqrt5 )

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Julie was able to walk 16 km through the zoo in 6 hours. how long will it take her to walk 24 km through the zoo?

Answer 20 points and brainiest ! on the board, your teacher writes an example of how to find the median. one of the numbers is erased, leaving what is shown, 18, 30, 26,12 22. what is the median? a. 10 b. 20 c. 24 d. 28