Simplify the radical expression -21√27x^9

Geometry. i need step by step explanation on how to do each problem.

What is the value of y? round to the nearest tenth

Consider the functions below. function 1 function 2 function 3 select the statement which is true about the functions over the interval [1, 2] a b function 3 has the highest average rate of change function 2 and function 3 have the same average rate of change. function and function 3 have the same average rate of change function 2 has the lowest average rate of change d.