Mean:
E[Y] = E[3X₁ + X₂]
E[Y] = 3 E[X₁] + E[X₂]
E[Y] = 3µ + µ
E[Y] = 4µ
Variance:
Var[Y] = Var[3X₁ + X₂]
Var[Y] = 3² Var[X₁] + 2 Covar[X₁, X₂] + 1² Var[X₂]
(the covariance is 0 since X₁ and X₂ are independent)
Var[Y] = 9 Var[X₁] + Var[X₂]
Var[Y] = 9σ² + σ²
Var[Y] = 10σ²
Answer:#4 is 3L Starwberry juice and 6L orange Jucie.
Step-by-step explanation:
Answer:
14/27 feet
Step-by-step explanation:
2 1/3 feet : 4 1/2 feet
= 7/3 : 9/2
= 7/3 ÷ 9/2
= 7/3 × 2/9
= (7*2)/(3*9)
= 14/27 feet
2 1/3 feet : 4 1/2 feet = 14/27 feet
4m + 90 = ≥ 350
350 - 90 = 260 ÷ 4 = 65
It will take at least 65 minutes for Jeremiah to complete the task.
Replace the variable with 65 to double check.
4 (65) + 90 = 350
Answer: It's C.
Step-by-step explanation: She isn't using the pythrogorean theorem
