## YanaSidlinskiy one year ago Answers that need to be checked! 1.) Determine whether each ordered pair is a solution of the system of linear equations. 3y=9x+12 3x-y=-4 a. (-2,-2) b. (0,4) MY ANSWER: I PUT YES

1. YanaSidlinskiy

2.) Solve the system of equations by graphing. x-y=4 y=-1 MY ANSWER: (1,-3) (0,-4)

2. YanaSidlinskiy

Lines intersect @ (1, -3)

3. Nnesha

yep that's right but why did you put 0 , -4 for 2nd question ?

4. YanaSidlinskiy

3.) Solve the system of equations by graphing. y=-4x+2 3y+12x=6 Lines intersect @ (1, -2)

5. YanaSidlinskiy

I have to find 2 points to plot it on the graph.

6. YanaSidlinskiy

Solve the system of equations by substitution. x=7y+6 -2x+14y=-12 I got infinitely many solutions.

7. Nnesha

last one when you solve 2nd equation for y you will get 1st equation so i would write infinitely many solution

8. Lurker

1)b 2) wrong 3)right 4)right

9. Nnesha

i mean 3rd question

10. YanaSidlinskiy

I'm confused....

11. YanaSidlinskiy

What do you mean?

12. YanaSidlinskiy

Are you saying I solved for number 3 wrong then?

13. Nnesha

what's the statement for 3rd question ? they are asking 4 solution ?

14. YanaSidlinskiy

For number 3, they are asking my to solve by graphing. Y HAS ALREADY been solved for.. Now I need to solve for the other equation. When solving for the other equation and plotting it on the graph, lines intersect at points (1, -2). Is the intersection point correct?

15. Nnesha

$$\color{blue}{\text{Originally Posted by}}$$ @YanaSidlinskiy 3.) Solve the system of equations by graphing. y=-4x+2 3y+12x=6 Lines intersect @ (1, -2) $$\color{blue}{\text{End of Quote}}$$ for this one you will get same line both equations are same so thats mean they are intersecting at every point

16. Nnesha

solve 2nd equation for y $\huge\rm 3y+12x=6$ subtract 12x both sides and then divide by 3

17. Nnesha

its called dependent system when 2 equations represent the same line (same slope ,same y-intercept )

18. YanaSidlinskiy

This topic is on solving by the graphing method....

19. Nnesha

okay so when you graph both equation you will get same line there isn't ONE point where they intersect so answer would be infinitely many solution

20. Nnesha

1) right 2nd) you just need a point where both lines intersect ,not the y-intercept 4th) right

21. Nnesha

let me know if u r still confused :=)

22. YanaSidlinskiy

Thanks! Glad you could help out a little!