Find the expected value for the random variable. 9
15
21
18
0.19
P(z)
0.15 0.21
0.38
0.09
E(z) = || (Type an integer or a decimal.)

If anyone has done the algebra 2 chaos theory portfolio would you be wiling to me? i kind of know what i'm doing i just don't know if i'm doing it right.

Which is the completely factored from of xy^3-x^3y

30 pts, will mark brainliestwhat is the period of the sinusoidal function? (picture 1)what is the minimum of the sinusoidal function? (picture2)what is the maximum of the sinusoidal function? (picture 3)