Answer:
The z score of the 65-mph speed limit is -0.75
Step-by-step explanation:
The z score is given by the relation;
![z = \frac{x- \mu}{\sigma}](https://tex.z-dn.net/?f=z%20%3D%20%5Cfrac%7Bx-%20%5Cmu%7D%7B%5Csigma%7D)
Where:
Z = Normal (Standard) or z score
x = Observed speed score
μ = Mean, expected speed
σ = Standard deviation
Where we plug in the values for x = 65-mph, σ = 8 mph and μ = 71 mph, into the z-score equation, we get;
![z = \frac{65-71}{8}= \frac{-6}{8} = -\frac{3}{4}](https://tex.z-dn.net/?f=z%20%3D%20%5Cfrac%7B65-71%7D%7B8%7D%3D%20%5Cfrac%7B-6%7D%7B8%7D%20%3D%20-%5Cfrac%7B3%7D%7B4%7D)
Hence the z score of the 65-mph speed limit =-3/4 or -0.75.
I think it is referring to the 1 gallon that weighs 8.5 pounds. Do maybe it’s 8.5
Answer:
z=-(51p+84)/(d+p)
Step-by-step explanation:
-p*(51+z)=dz+84
-51p-pz=dz+84
-51p-84=dz+pz
z=-(51p+84)/(d+p)
Multiplying both sides by y+7, we get 2-y=(3y+21)/5 and then by multiplying both sides by 5 we get 10-5y=3y+21. After that, subtract 21 from both sides as well as add 5y to both sides to get -11=8y, so divide by 8 to get -11/8=y
A gets 5 parts and I gets 8 parts
So 5+8=13. A will get 5/13 parts of the total
5/13*32(total)=12.3 since he can’t get .3 we round and Amir gets 12 leaving 20 for Isaac.