Help with a few quick questions (Only 14 year olds work so easy)

1) For the two numbers "-2 and 8", it is impossibl to find the geometric mean. Is this true or false? And explain your answer

2)Write the missing numbers in this fraction sum:

"1 OVER 3" PLUS "8 OVER X" X=?

3) The area of face of a cube is 9xSQUARED.

Write and expression for the total surface rea of the cube. Write your answer as simply as possible

Also, write an expression for the volume of the cube. Also as simply as possible.

4) The fraction "1 OVER 9" is half of the fraction ________

THNK YOU!