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Mathematics 9 Online
OpenStudy (diana.xl):

Check my answer?

OpenStudy (diana.xl):

@Directrix

Directrix (directrix):

Part A is to write a system of linear equations. You did not do that.

Directrix (directrix):

x + y = 8 12x + 10y = 86 Those two equations make up the system and both are require in the answer region.

OpenStudy (diana.xl):

oh ok. so other than that the rest are correct?

Directrix (directrix):

No. The work for part B cannot be correct because it did not come from solving the system of equations.

Directrix (directrix):

The system has to be solved by elimination which means eliminating a variable. x + y = 8 12x + 10y = 86 ----------------

Directrix (directrix):

@Diana.xL Are you still live in this thread? x + y = 8 12x + 10y = 86 ---------------

OpenStudy (diana.xl):

is this correct? x + y = 8 12x + 10y = 86 ---------------- (x + y = 8)(-10) 12x + 10y = 86 ------------------- -10x - 10y = -80 12x + 10y = 86 ----------------- 2x = 6 --------------- x = 3 ---------------- x + y = 8 3 + y = 8 -------------- y = 5

Directrix (directrix):

Yes.

Directrix (directrix):

The answers are what you had already typed in but the work you typed in did not support the answers. So, go back and change both parts of that question.

Directrix (directrix):

Looks good to me. Did you correct part A by entering the 2 equations?

OpenStudy (diana.xl):

yep :) thnx!

Directrix (directrix):

You are welcome.

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