X = 60
90 + 30 = 120
180-120=60
Answer:
A
Step-by-step explanation:
I'm not sure what to say here
Answer:
n = 1537 represent the sample size of American over 46
X = 1537-1245=292 represent the number of Americans over 46 who smoke
And for this case in order to estimate the population proportion we can use this formula:

Where:
X represent the number of people with the characteristic desired and n the sample size. If we replace we got:

Step-by-step explanation:
For this case we deine the parameter of interest p as the proportion of Americans over 46 who smoke.
We know the following info provided:
1245 people don't smoke
n = 1537 represent the sample size of American over 46
X = 1537-1245=292 represent the number of Americans over 46 who smoke
And for this case in order to estimate the population proportion we can use this formula:

Where:
X represent the number of people with the characteristic desired and n the sample size. If we replace we got:

Is the 12 and 7 together or.....
the answer is z-m=z+bx so z-m-z=bx and x=-mb
So it's the first option
the solution is x= - mb