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?

What solution is correct for 4 x + 5 = 9 + 4 x

What is the sum of a number and its opposite? use a model to your explanation

What is 2 + 2/5 + 1 + 3/5

The amount that results when $4000 is compounded at 6% annually over seven years

14 boys and 21 girls will be equally divided in to each groups what is the biggest number the you can divide the groups into

Explain why 8,000: 800 = 10

Train A leaves the station every 9 minutes. TrainB leaves the station every 15 minutes. If it is 2:00 pm now and both left, when is the next time that both trains will leave together?

The next number in the series of intervals of 38, 36,30,28,22, is=

How to find the interior angle of polygon

What is slope and y-intercept of the equation 4x - 3y = 2?