Question

when solving a system of equations by substitution, what is meant by a useless result (12 = 12)? a. parallel lines b. no solution c. inconsistent system d. dependent system please select the best answer from the choices provided

Explanation:

In a system of linear - equations, when substitution results in a statement like \(12 = 12\) (a true but non - informative statement), it means the two equations represent the same line. A system of equations where the equations represent the same line is called a dependent system. Parallel lines result in a false statement like \(12=15\) (inconsistent system with no solution).

Answer:

D. dependent system