Use pivots and row operations to solve the following system. Show all of your row operations and your intervening matrices. Write the final matrix in triangular for and solve by using back substitution. A. 2x+y - z=1 x + 2y + z = 8 x + y - 2z = -3

Solve the following system of equations by using row operations on matrices. 18x + 6y = 2 12x - 24y = 20

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Use matrices to solve the system.

you have to use each of these a. A+B  b. A-B c. -4A  d. 3A+2B to solve the matrix

Circle the pivots in the following matrix: 0 -1 -2 1 1 2 -1

There are 5,500 Scandinavians on a large cruise ship. They are all from either Norway, Sweden, or Finland. There are twice as many Finns as Norwegians and four times as many Swedes as Finns. Individually, how many Swedes, Finns, and Norwegians are on the ship? Write the three equations: Write the Augmented matrix: Solve using elementary row operations:

The order of matrix A is 3x4 and the order of matrix B is 4x9. The order of matrix AB is: OA. 4x3 OB. 3x9 O C.9x3 OD. 4x4

You have space in your garden for 55 small flowering bulbs. Crocus bulbs cost $0.55 each and daffodil bulbs cost $0.95 each. Your budget allows you to spent $41.85 on bulbs. How many crocus bulbs and how many daffodil bulbs can you buy? Write a system of equations to represent the situation. Solve using matrices. Write the matrix and inverse equations.