the perimeter of an equilateral triangle is given as 15x + 30. Write two expressions to represent the perimeter. Use factoring to write one of the expressions.

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?

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?