The following are the ages (years) of 5 people in a room: 23, 20, 15, 12, 17
A person enters the room.
The mean age of the 6 people is now 19.
What is the age of the person who entered the room?​

Raj encoded a secret phrase using matrix multiplication. using a = 1, b = 2, c = 3, and so on, he multiplied the clear text code for each letter by the matrix to get a matrix that represents the encoded text. the matrix representing the encoded text is . what is the secret phrase? determine the location of spaces after you decode the text. yummy is the corn the tomato is red the corn is yummy red is the tomato

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

What is the measure of angle x? a.101 b.158 c.44 d.79