Please help me with
1. what is the solution of the system? solve using matrices
{ 7x+2y=-38
{13x-3=32

A. [-54]
[-10]

B. no solution

C. [10]
[54]

D. [-10]
[-54]

Question

Please help me with 
1. what is the solution of the system? solve using matrices 
{ 7x+2y=-38
{13x-3=32

A. [-54]
    [-10]

B. no solution 

C. [10]
    [54]

D. [-10]
    [-54]

anonymous · Answer

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anonymous · Answer

im sorry I cant figure this out :(

anonymous · Answer

its find ill try and figure it out :/

anonymous · Answer

Do you want to do it using a formula (involving finding the inverse of a matrix) or by reducing an augmented matrix?

anonymous · Answer

yah i do i just dont understand how to do it

anonymous · Answer

We'll do it by row reducing.

Did you forget a y in the second equation?

anonymous · Answer

yes i did

anonymous · Answer

ok

anonymous · Answer

I think i may have figured it out is it [10]
                                                               [54]

anonymous · Answer

That does not satisfy the second equation: $13x-3y = \begin{cases}13(10)-3(54) = 130 - 112 = 18 \ 32\end{cases}$

anonymous · Answer

Sorry, it should be
$$13x-3y = \begin{cases}13(10)-3(54) = 130 - 162 = -32 \ 32\end{cases}$$
Did you forget a -?

anonymous · Answer

oh i mixed it up

anonymous · Answer

I guess you are right then. What method did you use?