Question

Which values for A and B will create infinitely many solutions for this system of equations?

4 x minus A y = 15. Negative 4 x + 6 y = B.
A = negative 6, B = 15
A = 6, B = 15
A = 6, B = negative 15
A = negative 6, B = negative 15

Answer 1

C

Explanation:

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Answer 2

Answer: C) A = 6, B = -15

Explanation:

In order to have infinitely many solutions, you must end up with 0 = 0 when adding the equations together.

4x - Ay = 15

-4x + 6y = B

(6 - A)y = 15 + B

↓ ↓

6 - A = 0 15 + B = 0

6 = A B = -15