Question

Which ordered pair (c, d) is the solution to the given system of linear equations?

Answer 1

Answer:

a

Step-by-step explanation:

i got it right on edge

Answer 2

Answer:

(-1,6)

Step-by-step explanation:

The missing part of this question is the system given as;

$-c+2d=13$

$-9c-4d=-15$

We solve for c in the top equation to get:

$c=2d-13$

Substitute $c=2d-13$ into the bottom equation to get:

$-9(2d-13)-4d=-15$

Expand to get:

$-18d+117-4d=-15$

Group similar terms to get:

$-18d-4d=-15-117$

$-22d=-132$

$d=6$

Put $d=6$ into $c=2d-13$ to get:

$c=2*6-13$

$c=12-13=-1$

The solution is (-1,6)