Answer:
x=27
Step-by-step explanation:
In order to solve for the variable, x, let us first expand the left side to get rid of the parenthesis:
Now, let us get all the variables of x on one side, and all the numerical values on the other in order to <u>isolate the variable</u>, x.
<em>I hope this helps! Please let me know if you have any further questions :)</em>
Answer:
Everything except 21/40. That is your ratio. The denominator always
Answer: |p-72% |≤ 4%
Step-by-step explanation:
Let p be the population proportion.
The absolute inequality about p using an absolute value inequality.:
, where E = margin of error,
= sample proportion
Given: A poll result of 72% with a margin of error of 4% indicates that p is most likely to be between 68% and 76% .
|p-72% |≤ 4%
⇒ 72% - 4% ≤ p ≤ 72% +4%
⇒ 68% ≤ p ≤ 76%.
i.e. p is most likely to be between 68% and 76% (.