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anonymous
 5 years ago
Solve by graphing. If there isn't a unique solution to the system, state the reason.
xy=3
x+y=5
Please explain how to solve. I was only able to find one point which I understand is the answer but how do I find the other points to determine where my lines are on the graph?
anonymous
 5 years ago
Solve by graphing. If there isn't a unique solution to the system, state the reason. xy=3 x+y=5 Please explain how to solve. I was only able to find one point which I understand is the answer but how do I find the other points to determine where my lines are on the graph?

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well two lines intersect at 1 point, infinite points(they are the same), or don't intersect(they are parallel).

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The point you find is probably the right point.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You should graph each line separately, be putting it in standard form if you like y = mx + b. and put in the intercepts and what not

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0But I need to know how to get the rest of the points to figure out what type of lines I have. ex: consistent, dependent, inconsistent

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0What do you mean by that? Two lines in a plane, will only intersect at most one point. Or they will be the same line. Or if they are parallel they will never intersect.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0To graph it, you can take the first line and make it y = x  3. Find the intercepts: by setting y = 0, solving for x. Then set x=0, solving for y. Plot these points and draw a line between them. That will be your first line.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Ok I have the point on the graph. Which way do you draw the line? I can draw the line in many directions. How do I find point 2 to give me the direction of my line?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0(4,1) is my first point after solving for X and Y

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0So we will take the first line x  y = 3. Set y=0 and find that x = 3.  < y=3 when x = 0  < x=3 when y= 0  

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You can do the same with the second line.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0WAIT sorry y=3! so it will be below the xaxis.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I hate to seem like an idiot but how did you get the 3 exactly?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I solved the equation like this: xy=3 x+y=5 add both equations 2x=8 Y's cancel and then divide both sides by 2 x=4 Then I did the same thing only cancelling the X's and then solved for Y getting Y=1

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0This gave me the intersecting point. Now I need to find the other points to know which way my two lines are going.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Ha don't say that. I am probably explaining badly

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You did that perfectly. We can now just draw the lines. We can get y =3 because x  y =3; x=0 (0) y =3.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so the first line will go through (0,3) (3,0) and (4,1)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok I understand now. Thanks for your help. I just got a little stuck.
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