Write and solve an equation to find the number n.
the sum of twice the number and a half is 10
equation is ? = 10
the number n= ?

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?

Perform the indicated operation. y^2 + 3y - 10 / 3y + 15

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?