Asmall class has 9 students, 3 of whom are girls and 6 of whom are boys. the teacher is going to choose two of the students at random. what is the probability that the first student chosen will be a boy and the second will be a girl? write your answer as a fraction in simplest form?

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

What is the equation of a line passing through (-6,5) and having a slope of 1/3

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?