Question

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.

9x – 2y = 88

-9x + 2y = -88

Answer 1

\[ a_1x+b_y=c_1\]

and

\[ a_2x+b_2y=c_2\]

\[ \large \frac {a_1}{a_2} = \frac {b_1}{b_2}= \frac {c_1}{c_2} \implies \text{ infinite solutions }\]

Answer 2

I'd like to note\[\underbrace{\begin{bmatrix}a_1&b_1\\a_2&b_2\end{bmatrix}}_A\underbrace{\begin{bmatrix}x\\y\end{bmatrix}}_B=\underbrace{\begin{bmatrix}c_1\\c_2\end{bmatrix}}_C\]\[AB=C,B=A^{-1}C\]\(A^{-1}\) can be found in multiple ways.

Answer 3

For all non-infinite solution problems. :P

Answer 4

Now which answer should I chose? The new medal policy isn't right :/

Answer 5

ok so everyone chooses one person :D

Answer 6

I choose fool and you choose bad

Answer 7

(y)

Answer 8

lol

Answer 9

i went with the first one