Question

Which expression gives the x-coordinate of the solution of the system?
{2x + 3y = 5
{3x + 5y = 7
(Again, it's one big bracket.)

Answer 1

Which expression gives the y-coordinate of the solution of the system?
{2x + y = 2
{3x + 4y = -22

and

Which expression shows the solution of the system?
{5x + 4y = 2
{-2y = 8 + 4x

If the chosen answers are needed I'll post those too.

Answer 2

@shiraz14

Answer 3

Think I'd need to see the system you are referring to? You might be missing a diagram here - please upload it. Thanks.

Answer 4

I believe it's referring to the system of equations. It didn't give me anything other than this.

Answer 5

@Ria23 : I'd need to be away for ~1 hour ... you can direct someone else if you wish. Thanks.

Answer 6

Ok, Thank yhu for yhur help.

Answer 7

@johnweldon1993 Do yhu understand how to wor these out? ;c I'm stuck and I have no idea what to do.

Answer 8

work*

Answer 9

Well just to see what type of answers they want to choose from...post the choices from the first question...the original topic one above :)

Answer 10

Ok. c:

Answer 11

A http://takeexam.next.ecollege.com/ec/pub/K12Content/Courses/resources/swfs/media/Ninth_Grade/Math/Unit19197/Lesson73338/Eqn004.gif

B http://takeexam.next.ecollege.com/ec/pub/K12Content/Courses/resources/swfs/media/Ninth_Grade/Math/Unit19197/Lesson73338/Eqn005.gif

C http://takeexam.next.ecollege.com/ec/pub/K12Content/Courses/resources/swfs/media/Ninth_Grade/Math/Unit19197/Lesson73338/Eqn006.gif

D http://takeexam.next.ecollege.com/ec/pub/K12Content/Courses/resources/swfs/media/Ninth_Grade/Math/Unit19197/Lesson73338/Eqn007.gif

Answer 12

Hmm....didn't want to open for me :/

Answer 13

Well we can at least go through the process of solving for 'x' in the first one...

Lets use the elimination method here...

2x + 3y = 5
3x + 5y = 7

We want to eliminate the 'y' ....we want to subtract these equations and make y = 0....so lets multiply the whole top equation by 5...and the whole bottom equation by 3...

5(2x + 3y = 5) ----> 10x + 15y = 25
3(3x + 5y = 7) ----> 9x + 15y = 21


so now our 2 equations are

10x + 15y = 25
9x + 15y = 21


Lets subtract them....

10x + 15y = 25
- (9x + 15y = 21)
-----------------
x = 4

Answer 14

Then plugin x. right?

Answer 15

Well if you wanted to solve for 'y' after that..yes...but the question above just says expression for the 'x' coordinate of the solution

Answer 16

Dx Oh God I have no idea what I'm doing.
The choices are like the other two questions I had before.

Answer 17

@Ria23 & @johnweldon1993 : This question does not seem to make any sense to me. It seems that there is a system which needs to be evaluated and the expressions above define its x- & y-coordinates. @Ria23 , please take a screenshot of the actual question and upload it into this thread. Thanks.

Answer 18

@Ria23 : Thanks for uploading the screenshot. Could you please check if there was a diagram of a system shown before this question? Some questions relate to diagrams and cannot be addressed unless the actual scenario/context of the question is known.

Answer 19

No, There's no diagram.

Answer 20

@Ria23 : Darn, I can't believe it's so simple - the answer to your first question is D.

Answer 21

:o Could yhu explain how yhu came to that answer?

Answer 22

Equate the quotient of the matrix dets (as provided in the options) to the deduced value of x in the original equations.

Answer 23

@Ria23 : Could you please upload the screenshots of the options for the other 2 questions as well, so we can look at them?

Answer 24

I'm logging off now. Goodbye.

Answer 25

Yes.