What is the equation of the circle with a diameter whose endpoints are (-3,-9) and (-7, 1)?

What is the solution of sqrt x+2-15=-3

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.