Answer:
a=-3/5
Step-by-step explanation:
Answer:
The standard deviation of the number of haunted houses in a large city is 3.
Step-by-step explanation:
In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:
In which
x is the number of sucesses
e = 2.71828 is the Euler number
is the mean in the given interval, which is the same as the variance.
According to ghost hunters, large cities have, on average, 9 haunted houses each.
This means that
a) What is the standard deviation of the number of haunted houses in a large city?
Square root of the variance, so:
The standard deviation of the number of haunted houses in a large city is 3.
Answer:
x + y = 0 is x = − y.
x - y + 2 = 0 is x = y − 2.
Answer:
∠3 = 142°
Step-by-step explanation:
L // M
∠2 = 38° {Corresponding angles are congruent}
∠2 + ∠3 = 180 {Linear pair}
38 + ∠3 = 180
∠3 = 180 - 38
∠3 = 142°
Start with y = x^2.
Vertical reflection over the x-axis: y = -x^2
Vertical translation up by 2: y = x^2 + 2
Horiz. transl. left by 5: y=(x+5)^2