6. Suppose the augmented matrices below correspond to either a system of linear equa- tions in 2 variables (x,y) or system of linear equations in 3 variables (x, y, z). These matrices may or may not be in RREF. You do NOT need to put them into RREF unless you need to in order to determine the solutions. What are the solutions to the system? If there are solutions, please write your answer as (x, y) or (x, y,z). If there are infinitely many solutions, please write your point in terms of one variable (you may choose the variable). 1 0 0 1 -7 (a) 0 0 1 0 -6 1 0 0 0 1 0-4 0 0 1 9. (b) 9. 1 0 (c) 0 1-4 0 0

When writing the following linear system of equations in the matrix form Ax = b -5x1 + 2x2 = -4 -2x₁ - 5x2 = −1 a. What is the matrix A?

Solve the following system of linear equations: X1 X2 X3 = -1 -2x7+5x2-4x3 = -4 x7+2x2-7x3 = -7 If the system has no solution, demonstrate this by giving a row-echelon form of the augmented matrix for the system. If the system has infinitely many solutions, select "The system has at least one solution". Your answer may use expressions involving the parameters r, s, and t. You can resize a matrix (when appropriate) by clicking and dragging the bottom-right corner of the matrix. The system has no solutions 0 0 0 Row-echelon form of augmented matrix: 0 0 0 0 0 0

Please write this on paper

How do you know whether a matrix has infinitely many solutions or one solution?

I need help with part a and part c. Thank you!

For the following systems of equations find the reduced row echelon form of the augmented matrix (write down both the augmented and the RREF) and then find all solutions that exist.  *picture attached* please do it in handwriting and not typing, or in a way so that its easier to read

Show how to use elimination matrices to solve the following system of equations.  Please give your final solution as either a point, no solution, or a set of solutions:   x - y - 2z = -1 -2x+2y+4z = 2 -2x+3y+z = 7

3xy - X2 = 5 7xy + 9x2 = 3 6xq - Xz =1 Write the system as a matrix equation where the first equation of the system coresponds to the first row. Select the correct choice below and fll to complete your choice.

I would like to request the written form RREF without fractions.I am having a hard time doing RREF