Can someone help me with my test i have too write out the whole entire process & simplify them - 1st -3(2x-5)
2nd - 5+3x-8y+2x+9y-12

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

How do you solve a question like this?

Can someone me do math because i am having a breakdown rn because i don’t get it