## MeganDarling 3 years ago Solving for 3 variables questions :o help! Solve the system by elimination 1: x+5y-4z=-10, 2x-y+5z=-9, 2x-10y-5z=0 . 2. Solve the system by substitution: 2x-y+z=-4, z=5, -2x+3y-z=-10. 3. A food store makes a 11–pound mixture of peanuts, almonds, and raisins. The cost of peanuts is \$1.50 per pound, almonds cost \$3.00 per pound, and raisins cost \$1.50 per pound. The mixture calls for twice as many peanuts as almonds. The total cost of the mixture is \$21.00. How much of each ingredient did the store use?

1. MeganDarling

options for the 1st one are : (5, –1, 0) (–5, 1, 0) (–5, –1, 0) (–5, –1, –2) Options for the second are: (–8, 7, 5) (–8, –7, 5) (8, –7, 5) (–8, –7, –5) And the 3rd : 3 lbs peanuts, 6 lbs almonds, 2 lbs raisins 8 lbs peanuts, 1 lb almonds, 2 lbs raisins 6 lbs peanuts, 3 lbs almonds, 2 lbs raisins 8 lbs peanuts, 2 lbs almonds, 1 lbs raisins

2. MeganDarling

I guess the 2nd one technically gives you z so haha that's nice eh?

3. josiahh

ok I can try to do this but it's gonna take a while. do you want the steps or just the answers?

4. MeganDarling

Well If it's not too much to ask of you I wouldn't mind having the steps as well :o

5. josiahh

ok I'll give it a shot. give me a minute

6. MeganDarling

Thanks (:

7. josiahh

still working on it :)

8. MeganDarling

Haha okay ^-^ Thanks for your time!

9. josiahh

I have the first two questions answered but the 3rd one is confusing me.

10. MeganDarling

Aw well any guess of yours on that one is as good as a guess of mine x3 It is a little dumb :P

11. MeganDarling

getting 2/3 on my quiz wouldn't be so horrible either x.x Although not as good as 3/3 hahah >.<

12. josiahh

There goes 1 and 2. Give me some times for the last one

13. MeganDarling

Thanks so much (: That looked like a whole lotta work!

14. josiahh

got it

15. MeganDarling

I'm confused on the 2nd one o.o

16. MeganDarling

because me thinks you got -4,1,5 But that isn't one of the options Dx

17. MeganDarling

And I was like Gasp O.o Oh no !

18. josiahh

oh yea haha. sorry. I copied your stuff wrong. you want me to do it over?

19. MeganDarling

Aw :/ I feel really bad wasting your time like this )x

20. josiahh

is one option (-8,-7,5)

21. MeganDarling

yus (:

22. MeganDarling

I listed the options above in a comment haha for the third question too!

23. josiahh

I might have gotten different answers for the 3rd one

24. MeganDarling

sorry its having a tough time opening one sec haha

25. MeganDarling

just breezing through our work herer haha

26. MeganDarling

27. MeganDarling

28. josiahh

29. MeganDarling

3 lbs peanuts, 6 lbs almonds, 2 lbs raisins : 8 lbs peanuts, 1 lb almonds, 2 lbs raisins : 6 lbs peanuts, 3 lbs almonds, 2 lbs raisins : 8 lbs peanuts, 2 lbs almonds, 1 lbs raisins So the 3rd one lol? your estimate?

30. josiahh

6 lbs of peanuts, 3 lbs of almonds, 2 lbs of raisin. 6+3+2=11 6(1.5)+3(3)+2(1.5)=21 and 6=3*2 I misunderstood the english thats all haha. it was not y=2x, it's x=2y...

31. MeganDarling

Alright (: Thanks a bunch ! I hope I can help you out sometime in the future haha! you deserve it.

32. josiahh

we'll see haha. Night... I gotta rest for tomorrow

33. MeganDarling

Goodnight (: