Answer:
C: 4x+3
Step-by-step explanation:
Combine the like terms.
7x-3x=4x and 5-2=3 so 4x+3.
Brainlyest plz
Answer:
$0.56
Step-by-step explanation:
She bought 1,5 poumds for $0.84
if we multiply the price by 2/3 we will find how much it would cost for one pound
2/3 × 0.84 = $0.56
Answer:
99%
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.
![\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=%5Cpi%20%5Cpm%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
In which
z is the zscore that has a pvalue of
.
The margin of error is:
![M = z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=M%20%3D%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
Sample proportion and same sample size, so what will determine the margin of error is z.
90% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
99% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
The 99% confidence interval has the largest margin of error.
Answer:
This question makes no sense but, the way that's worded, each user receives 12.57 messages a day. If you meant how many messages total its 531681.6 messages.