Which expression is equivalent to a^4b^2 square root of a

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15

Which graph shows the solution to the system of linear inequalities? y-4t< 4 y