4a^3b^5 - 16a^5b^2 + 12a^2b^3 =
4a^2b^2 (ab^3 - 4a^3 + 3b) <==
6 nickels 1 quarter 3 dimes
Answer:
31 feet
Step-by-step explanation:
X+6 = 3x - 12 (right?)
6 = 2x-12
18 = 2x
9 = x
4x-15 = 2x+3
2x-15 = 3
2x = 18
x = 9
Basically, x = 9
Using Z-test:
The Z score is:
Z = (198 - 200) / 23 = -0.087
Assuming normal distribution and from the z table, the probability based on the Z score is
p = 0.47 or 47%
Therefore, there is a probability of 47% that the 15 elephants will have a mean weight of 198 lbs.
