jvelasquez2922 jvelasquez2922 26-05-2023 Mathematics contestada 3.a. Fill in the blank and prove the resulting statement: If X is a random variable and t is a constant, then Var(tX) = Var_x). b. If E(X)= 7 and Var(X) = 2, then find E(3x + 4) and Var(3x +4).