Answer:
6.32455532034 or just 6
Step-by-step explanation:
68 degrees because they’re vertical angles
So the expression is:
![4 a^{2} + 2a + 4 a^{2} - 5](https://tex.z-dn.net/?f=4%20a%5E%7B2%7D%20%2B%202a%20%2B%204%20a%5E%7B2%7D%20-%205)
You can combine like terms, which are terms that contain the same variables raised to the same power. That means you can combine the two
![4 a^{2}](https://tex.z-dn.net/?f=4%20a%5E%7B2%7D)
.
![4 a^{2} + 4 a^{2} = 8 a^{2}](https://tex.z-dn.net/?f=4%20a%5E%7B2%7D%20%2B%204%20a%5E%7B2%7D%20%3D%208%20a%5E%7B2%7D)
The other terms can't be combined.
Your final answer should be
![8 a^{2} +2a-5](https://tex.z-dn.net/?f=8%20a%5E%7B2%7D%20%2B2a-5)
.
Answer:
0.1875
Step-by-step explanation:
σM=σ/√N
=8/√7500
=8/86.608
=0.092
Z=(x-μ)/σ/√N
=(25.5-36)/8/√7500
=-10.5/0.0092=-1141.304
Z score = -1.3125
=(27-36)/8/√7500
=
=9/0.0092=978.261
Z score= -1.125
-1.125-(-1.3125)=-1.125+1.3125)= 0.1875
The probability that the sample mean will be between 25.5 and 27 years
P(between 25.5 and 27) = 0.1875
(-4,5) is the correct answer because it needs to be (-y,x) meaning the original x value stays the same because we’re going backwards and the y value changes signs