What is the expected value of X?

X 2 3 5 6 8

P 0.2 0.1 0.25 0.05 0.4

options:

a. 4.6

b. 4.8

c. 5.45

d. 5.95

i think its c but idk pls help

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?

Which expression is a perfect cube? a. x8 b. y24 c. m28 d. x64

4. bob solved the inequality problem below incorrectly. explain his error and redo the problem showing the correct answer. ? 2x + 5 < 17 ? 2x + 5-5 < 17-5 -2x/-2 < 12/-2 x < -6