It could be 190 because its a half measure
Add the like terms.
The like terms in this case are:
-4x^2 and -2x^2
This makes -6x^2
-3y and 5y
This makes 2y
-8 and 1
This makes -7
Your answer is (-6x^2+2y-7)
Answer:

Step-by-step explanation:
The confidence interval for the population mean x can be calculated as:

Where x' is the sample mean, s is the population standard deviation, n is the sample size and
is the z-score that let a proportion of
on the right tail.
is calculated as: 100%-99%=1%
So, 
Finally, replacing the values of x' by 308, s by 17, n by 15 and
by 2.576, we get that the confidence interval is:

Hello!
Annually means once a year so if it is compounded annually then it is compounded only once per year, meaning interest is added to principal only 1 time per year.
Hope this helps! Any questions please just ask!! Thank you so much!!