## MeganDarling 2 years ago Need some help with these problems :/ 1. Your club is baking vanilla and chocolate cakes for a bake sale. They need at most 15 cakes. You cannot have more than 11 chocolate cakes. Write and graph a system of inequalities to model this system. Let x = the number of vanilla cakes. Let y = the number of chocolate cakes. 2.Solve the system of inequalities by graphing. https://www.connexus.com/content/media/642225-162012-115732-AM-38496864.png 3. Solve the system of inequalities by graphing. https://www.connexus.com/content/media/642225-162012-115514-AM-349314999.png

1. MeganDarling

Help on any one of them would be appreciated :/

2. MeganDarling

Hey Satellite (:

3. satellite73

hi

4. MeganDarling

Hahah yay, Satellite to the rescue.

5. satellite73

the second two wont open the first one is going to be $x+y\leq 15$ $y\leq 11$

6. MeganDarling

Hm thats odd :/ One sec I'll copy em down by hand.

7. satellite73

picture looks like this http://www.wolframalpha.com/input/?i=x%2By%3C%3D15%2Cy%3C%3D11

8. MeganDarling

Thanks for that ^-^

9. satellite73

yw

10. MeganDarling

y is Less than or equal to -4x-2 , y > 3x-2 Is the first problem.

11. MeganDarling

and y is greater than or equal to 3 , y> lx+1l Was the 2nd one, haha those are absolute value signs sorta btw x.x

12. satellite73

|dw:1349639449107:dw|

13. MeganDarling

LOL XD

14. MeganDarling

15. MeganDarling

These questions are junk :P

16. satellite73

here is a better picture the idea is to graph the two lines and then shade in the appropriate region http://www.wolframalpha.com/input/?i=y%3C+-4x-2+%2C+y+%3E+3x-2

17. MeganDarling

I hate solving junk by graphing so much x.x I'd rather like chop off a finger Dx

18. satellite73

you have to graph $$y=-4x-2$$a line with slope $$-4$$ and $$y$$ intercept $$-2$$ then graph $$y=3x-2$$ a line with slope 3 and y intercept also $$-2$$

19. MeganDarling

Yeah I get that I just suck at actually figuring it out :/

20. satellite73

what region to graph, or how to graph the lines?

21. MeganDarling

well haha I'll give em my best educated guess x)

22. MeganDarling

How to graph them :P

23. satellite73

i sent you a link with the graph of the second one

24. satellite73

oh get some graph paper and plot two points for each line for example, for $$y=-4x-2$$you know it crosses the $$y$$ axis at $$(0,-2)$$ and if $$x=2$$ you get $$-10$$ so $$(2,-10)$$ is on the graph, or, go over one, down 4 connect the dots la la la la la repeat for second line it is tedious but you can do it

25. satellite73

or type them in to wolfram and let the machine do it there is really no shortcut, you just have to graph the lines

26. MeganDarling

lol yeah ! that's true, I think I'll be alright on the test on it. but I do need to find my pesky graph paper :/ Keeps hiding on me.

27. MeganDarling

I'm probly gonna start using that site more too haha

28. satellite73

as for $$y=|x+1|$$ it looks like a V sitting at $$(-1,0)$$

29. satellite73

|dw:1349640010650:dw|

30. MeganDarling

Thanks again Satellite! I gotta get going sadly x.x

31. MeganDarling

Thanks so much (:

32. satellite73

shad in the stuff above, because it says $$y>|x+1|$$

33. satellite73

later

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