Which of the following can not be used on a matrix when solving a system of equations?

a. interchange rows
b. multiply a row by a constant
c. add a constant to a row

Question

Which of the following can not be used on a matrix when solving a system of equations?


a. interchange rows
b. multiply a row by a constant
c. add a constant to a row

amistre64 · Answer

one of them has to stand out to you

sambam · Answer

interchange rows?

amistre64 · Answer

the rows define the equations of the system;  interchanging rows does not alter the equation in the system.  so no

amistre64 · Answer

3x + 7y = 2
5x - 2y = 3

has the same solutions as

5x - 2y = 3
3x + 7y = 2

sambam · Answer

Okay so its add c. add a constant to a row right? @amistre64

amistre64 · Answer

correct, adding a constant actually shifts a graph to a different location, and thereby produces a different result

sambam · Answer

Thank you so much.

amistre64 · Answer

good luck