5 + x - 6 = 4
x= 5
5 plus 5 equals 10 and 10 minus 6 is equal to 4.
Answer:
remember pemdas?
Step-by-step explanation:
Parentheses
Equal sign
Multiplication
Division
Addition
Subtraction
So you would have to divide first.
Answer:
3x^2 + 7x - 18
Step-by-step explanation:
Im not sure if im correct but I think the answer is 82 hours.
(a) P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2) = 0.11 + 0.52 + 0.19 = 0.82
(b) P(X ≥ 1) = P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) = 0.52 + 0.19 + 0.12 + 0.06 = 0.89
(c) µ = 0×0.11 + 1×0.52 + 2×0.19 + 3×0.12 + 4×0.06 = 1.5
(d) σ² = (0²×0.11 + 1²×0.52 + 2²×0.19 + 3²×0.12 + 4²×0.06) - µ² = 1.07
σ = √(σ²) ≈ 1.03
