Answer:
X > -4
Step-by-step explanation:
Collect the like terms which literally leaves you with -x<4
Then just changes the signs, hence the answer.
Please mark brainliest!
Answer:
It has millions of tickets. On each ticket is written a number a dollar amount. The exact average and SD are unknown but are estimated from the sample to be $20,000 and $5,000 respectively.
Step-by-step explanation:
Given that:
sample size n = 1600
sample mean
= 20000
standard deviation = 5000
The objective is to choose from the given option about what most closely resembles the relevant box model.
The correct answer is:
It has millions of tickets. On each ticket is written a number a dollar amount. The exact average and SD are unknown but are estimated from the sample to be $20,000 and $5,000 respectively.
However, if draws are made without replacement, the best estimate of the average amount for the bride will be $20,000
Similarly, the standard error for the sample mean = ![\dfrac{s}{\sqrt{n}}](https://tex.z-dn.net/?f=%5Cdfrac%7Bs%7D%7B%5Csqrt%7Bn%7D%7D)
![= \dfrac{5000}{\sqrt{1600}}](https://tex.z-dn.net/?f=%3D%20%5Cdfrac%7B5000%7D%7B%5Csqrt%7B1600%7D%7D)
![= \dfrac{5000}{40}}](https://tex.z-dn.net/?f=%3D%20%5Cdfrac%7B5000%7D%7B40%7D%7D)
the standard error for the sample mean = 125
Answer:
<h2>18mins</h2>
Step-by-step explanation:
This problem is on combined work rate
given that
Marta can vacuum the house in 30 min
then her rate= 1/30
Also, her daughter will take 45 min to vacuum the house
her daughter's rate will be = 1/45
then the combined work rate is
1/30+1/45=1/T
30+45/30*45=1/T
75/1350= 1/T
1/18=1/T
This means that they will both take 18 minutes working together to vacum a house
You can predict that it will be less then either of the factors. if you take half of half from anything will you ever have more than half of the original.
-i know its a little confusing its the best i could come up with