The row-echelon form of the augmented matrix of a system of equations is given. Find the solution of the system 1 0 -1
0 1 5-4
0 0 1 1

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Which function has the domain x> -11?

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25