Please help the image is attached

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?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Write the rational number in lowest terms 99/-15