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Which of the following are NOT allowable operations when the Gaussian elimination method is used to solve a system of linear equations?(i) A multiple of elements of one row may be added to the corresponding elements of any other row.(ii) Any two columns may be interchanged.(iii) All elements of any row may be squared.(iv) All of the elements of any row may be multiplied by any nonzero number.

Graph the system of equations:             x+y=202x-y=10

Solve the system of equations. 2x-y+5z=-7x+y-2z=-2x-y+4z=-4

Match each operation with it’s correct answer.

How many solutions does each system of equations have? You can graph to find the answers or solve algebraically. (Each ordered pair (x,y) is one solution.)

Perform the row operation(s) on the given augmented matrix in the order given. a )   – 4 R 1 + R 2 → R 2 b )   – 2 R 1 + R 3 → R 3 c )           5 R 2 + R 3 → R 3   

Solve the system by any means and only enter the y value. x-7y=-11 5x+2y=-18

Solve the system of equations by substitution. 5 x – 2 y = – 1 x + 4 y = 35

Select the function that matches the description.Has 2 vertical asymptotes at x=3, x=-3Has 1 horizontal asymptote at y=5 

Suppose y=x2+12x+6 and enter the appropriate values below. Only enter the number. The y-value of the y-intercept is y=[BLANK-1]. The y-value of the vertex is y=[BLANK-2]. The x-value of the vertex is x=[BLANK-3]. The axis of symmetry is x=[BLANK-4]. When x=2, y=[BLANK-5].