help with solution?

Question

x+3y=-14
-2x-6y=24
A)-2,-3
B)-2,-4
C)no solution
D)many soltuions

Answer 1

b is the answer. -2+3(-4)=-14.-2+-12=-14.

Answer 2

Both equation will give a straight line with the same slope, so there is no solution since y intercepts are different.

If you multiply top equation by 2, you will have 2x + 6y = -28. When you and two equations together, you end up with 0 = -4, since that is a false statement, we can conclude that there is no solution by working it out.

Answer 3

No solution. If you multiply the first equation by 2 on both sides you obtain 2x+6y=-28

Since the second equation is equivalent to 2x+6y=-24, this poses a contradiction. Therefore, no solution.

Answer 4

-2 + 3(-3) = -14
-2 + (-9) = -11 NOT -14 (A is incorrect)

-2 + 3(-4) = -14
-2 + (-12) = -14
-14 = -14

-2(-2) - 6(-4) = 24
4 - (-24) = 28 NOT 24 (B is incorrect)
no solution.

Answer 5

well look is easy, what you do is plug in the answers into x and y and see if any work, if none work, or if both work.
So for example -2+3(-3) = -14 is using -2, -3 vs. x and y
If only A works then is A
If only B works then is B
If neither works then is C
If both A and B works then is D

Answer 6

b is the answer.

To solve it, simply substitute the values into the equation. the left hand side must equal to the right hand side

Answer 7

no solution make the X's equal but opposite when ypou do it makes equations equal but opposites which means no solution

Answer 8

u seem to just post ur questions in here instead of actually trying to do ur hw..