In Exercises 41 to 56, solve each inequality. Write the answer using interval notation.

Chapter 8: Matrices 8.2: Operations with matrices A matrix A is equalijo [a ] where i and j have to be numbers greater than 1. In order for a matrix to be equal to another its numbers a and its order (ij) have to be the same. For example: 1 7 = 7 9 5 In order for this two matrices to be equal x must be equal to 5 y equal to 1 and z equal to 9. Addition and subtraction Two matrices have to be the same in order for them to be added or subtracted from each other. To add or subtract a matrix you have to add or subtract the numbers from each order by the the same order of the other matrix. For example: 2 3 −3 7 A = , B =