I think its 3 1/2 but I'm not sure if there is enough info to solve this
Answer:
72
Step-by-step explanation:
Find the LCM
6=2x3
8=2x2x2
9=3x3
12=2x2x3
LCM=2³x3²
=72
Answer:
The values of a and b are -1.28 and 1.28 respectively.
Step-by-step explanation:
It is provided that the area of the standard normal distribution between a and b is 80%.
Also it is provided that a < b.
Let us suppose that a = -z and b = z.
Then the probability statement is
![P (a](https://tex.z-dn.net/?f=P%20%28a%3CZ%3Cb%29%3D0.80%5C%5CP%28-z%3CZ%3Cz%29%3D0.80)
Simplify the probability statement as follows:
![P(-z](https://tex.z-dn.net/?f=P%28-z%3CZ%3Cz%29%3D0.80%5C%5CP%28Z%3Cz%29-P%28Z%3C-z%29%3D0.80%5C%5CP%28Z%3Cz%29-%5B1-P%28Z%3Cz%29%5D%3D0.80%5C%5C2P%28Z%3Cz%29-1%3D0.80%5C%5CP%28Z%3Cz%29%20%3D%20%5Cfrac%7B1.80%7D%7B2%7D%5C%5CP%28Z%3Cz%29%20%3D0.90)
Use the standard normal distribution table to determine the value of <em>z</em>.
Then the value of <em>z</em> for probability 0.90 is 1.28.
Thus, the value of a and b are:
![a = -z = - 1.28\\b = z = 1.28](https://tex.z-dn.net/?f=a%20%3D%20-z%20%3D%20-%201.28%5C%5Cb%20%3D%20z%20%3D%201.28)
Thus,
.
Divide each side by 2 1/4 to get x by itself. The answer is -24 < x and the sign didn't change because we didn't divide by a negative.