Find the common difference of the arithmetic sequence. 9, 13, 17, 21, . .

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?

What is the distance between the points 4,10 and -3,-14 on the coordinate plane

What two criteria are needed for triangles to be similar