The mean age of 5 people in a room is 28 years.
A person enters the room.
The mean age is now 29.
What is the age of the person who entered the room?

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?