anonymous
  • anonymous
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?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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
anonymous
  • anonymous
I guess the 2nd one technically gives you z so haha that's nice eh?
anonymous
  • anonymous
ok I can try to do this but it's gonna take a while. do you want the steps or just the answers?

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anonymous
  • anonymous
Well If it's not too much to ask of you I wouldn't mind having the steps as well :o
anonymous
  • anonymous
ok I'll give it a shot. give me a minute
anonymous
  • anonymous
Thanks (:
anonymous
  • anonymous
still working on it :)
anonymous
  • anonymous
Haha okay ^-^ Thanks for your time!
anonymous
  • anonymous
I have the first two questions answered but the 3rd one is confusing me.
anonymous
  • anonymous
Aw well any guess of yours on that one is as good as a guess of mine x3 It is a little dumb :P
anonymous
  • anonymous
getting 2/3 on my quiz wouldn't be so horrible either x.x Although not as good as 3/3 hahah >.<
anonymous
  • anonymous
There goes 1 and 2. Give me some times for the last one
anonymous
  • anonymous
Thanks so much (: That looked like a whole lotta work!
anonymous
  • anonymous
got it
anonymous
  • anonymous
I'm confused on the 2nd one o.o
anonymous
  • anonymous
because me thinks you got -4,1,5 But that isn't one of the options Dx
anonymous
  • anonymous
And I was like Gasp O.o Oh no !
anonymous
  • anonymous
oh yea haha. sorry. I copied your stuff wrong. you want me to do it over?
anonymous
  • anonymous
Aw :/ I feel really bad wasting your time like this )x
anonymous
  • anonymous
is one option (-8,-7,5)
anonymous
  • anonymous
yus (:
anonymous
  • anonymous
I listed the options above in a comment haha for the third question too!
anonymous
  • anonymous
I might have gotten different answers for the 3rd one
anonymous
  • anonymous
sorry its having a tough time opening one sec haha
anonymous
  • anonymous
just breezing through our work herer haha
anonymous
  • anonymous
your work * lol xP
anonymous
  • anonymous
I really appreciate your time, your awesome honestly, I must say!
anonymous
  • anonymous
np. Im glad I helped.
anonymous
  • anonymous
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?
anonymous
  • anonymous
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...
anonymous
  • anonymous
Alright (: Thanks a bunch ! I hope I can help you out sometime in the future haha! you deserve it.
anonymous
  • anonymous
we'll see haha. Night... I gotta rest for tomorrow
anonymous
  • anonymous
Goodnight (:

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