Question

Help please?! Medal + Fan

Choose the equivalent system of linear equations that will produce the same solution as the one given below.

4x - y = -11
2x + 3y = 5

-4x - 9y = -19
-10y = -30

4x + 3y = 5
2y = -6

7x - 3y = -11
9x = -6

12x - 3y = -33
14x = -28

Answer 1

I'm really not sure what the answer is.

Answer 2

hmm... here is what I did (I used substitution method)
4x - y = -11 --> y = 4x + 11
2x + 3y = 5
= 2x + 3(4x + 11) = 5 distribute
2x + 12x + 33 = 5 add like terms and subtract both sides by 33
14x = -28 <-- (shortcut: which option has that?)

Answer 3

D has 12x - 3y = -33
14x = -28

so D has the -28

Answer 4

isn't that the solution given at the bottom and the 4 above that are the options?

Answer 5

this is the question:

Choose the equivalent system of linear equations that will produce the same solution as the one given below.

4x - y = -11
2x + 3y = 5
---------------
A) -4x - 9y = -19
-10y = -30

B) 4x + 3y = 5
2y = -6

C) 7x - 3y = -11
9x = -6

D) 12x - 3y = -33
14x = -28

Answer 6

oh okay thanks for clarifying that. :)

Answer 7

sorry for confusing you

Answer 8

it's no problem :)