Answer:
x = 2.
Step-by-step explanation:
I am taking this to mean
2^3 * x^3 = (2 + x)^3
8x^3 = (2 + x)(4 + 4x + x^2)
8x^3 = 8 + 8x + 2x^2 + 4x + 4x^2 + x^3
7x^3 - 6x^2 - 12x - 8 = 0
7(2)^3 - 6(2)^2 - 12(2) - 8
= 56 - 24 - 24 - 8 = 0
x = 2.
This is the only real root.
Answer:
The answer is below
Step-by-step explanation:
Given that mean (μ) = 266 days, standard deviation (σ) = 16 days, sample size (n) = 16 women.
a) The mean of the sampling distribution of Xbar () is given as:
The standard deviation of the sampling distribution of Xbar () is given as:
b) The z score is a measure in statistics used to determine by how much the raw score is above or below the mean. It is given by:
For x > 270 days:
The probability the average pregnancy length exceed 270 days = P(x > 270) = P(z > 1) = 1 - P(z < 1) = 1 - 0.8413 = 0.1587 = 15.87%
Answer: 50/50 right/wrong/both
Step-by-step explanation: If you guess on a true false test it could end one of 3 ways 1 being getting all the answers right 2 you get all the answers wrong and 3 you get half of the answers wrong and half of the answers right
5% of $60 is 3, so she will earn $63 in a year.
Answer:
(-4, -1)
Step-by-step explanation:
-3x - 8y = 20; y = 5x + 19
y = 5x + 19; -3x - 8y = 20
y = 5x + 19
-3x - 8y = 20
-3x - 8(5x + 19) = 20
-43x - 152 = 20
-43x - 152 + 152 = 20 + 152
-43x = 172
-43x / -43 = 172 / -43
x = -4
y = 5x + 19
y = (5)(-4) + 19
y = -1