Is the point (4,-3) a solution for this system?

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

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).

Simplify -4z+2y-y+-18z a.-22z+y b.-14z+2 c.3y+22z d.y +14z