Solution :
Let :
X = number of overtime hours
S = total weekly salary
S =
S = 480 + 18X
E(S) =
= 750
Mean of S = 750
Var (S) =
Var(S) =
= 5184
Variance of S = 5184
The standard deviation equals square root of 5184 = 72
42 point Plus brainliest slove it g(x) = (x + 2)(x − 1)(x − 2)
1 answer:
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Answer:
(x - 8)² = 20(y + 6)
Step-by-step explanation:
The focus of the parabola is (8,-1) and the equation of the directrix is y = - 11.
So, the parabola opens up and the axis of symmetry is x = 8 line.
Now, the axis of symmetry and the directrix meet at the point (8,-11).
So, the vertex of the parabola will be the midpoint of (8,-1) and (8,-11) i.e. (8,-6).
Now, half of the distance between the focus and the directrix is = a = units.
So, the equation of the parabola in vertex form will be
(x - 8)² = 4 × 5 × (y + 6)
⇒ (x - 8)² = 20(y + 6) (Answer)