Which if the shaded regions below represents 3/5 of the whole circle

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e. g. 98.765).

Find the solution of this system of equation -7x+y=-20 9x-3y=36