Answer: y + 1 = 2 (x -1)
Step-by-step explanation:
Point slope form is:
y - y1 = m (x - x1)
Point on the line is (1, -1) and slope is 2
m = 2
y1 = -1
x1 = 1
y - (-1) = 2 (x - 1) or y + 1 = 2 (x -1)
first you put 12 over 100 and that is 12/100 and then simplify
The ranges are 14, 4, and -21
16 or 8 what i did was multiplied it by .5
Answer:
Step-by-step explanation:
Let x be the random variable representing the length of pregnancies in giraffes. Since it is normally distributed and the population mean and population standard deviation are known, we would apply the formula,
z = (x - µ)/(σ/√n)
Where
x = sample mean
µ = population mean
σ = standard deviation
n = number of Samples
From the information given,
µ = 430
σ = 9
n = 25
the probability that the sample mean length will be between 429 days and 432 days is expressed as
P(429 ≤ x ≤ 432)
For x = 429,
z = (429 - 430)/(9/√25) = - 0.56
Looking at the normal distribution table, the probability corresponding to the z score is 0.288
For x = 432,
z = (432 - 430)/(9/√25) = 1.11
Looking at the normal distribution table, the probability corresponding to the z score is 0.867
Therefore,
P(429 ≤ x ≤ 432) = 0.867 - 0.288 = 0.579
