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anonymous
 5 years ago
the company discovered that it costs $45 to produce 2 calculators, $143 to produce 4 calculators and $869 to produce 10 calculators. find the cost of producing 7 calculators. use the quadratic function to solve
anonymous
 5 years ago
the company discovered that it costs $45 to produce 2 calculators, $143 to produce 4 calculators and $869 to produce 10 calculators. find the cost of producing 7 calculators. use the quadratic function to solve

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Put the numbers into \[y =ax ^{2}+bx+c\] form. So your points would be (2, 450) (4, 143) and (10, 869). Plug the x in for the x in the equation and y in for y in the equation and then enter it into your matrix (3x4) in the graphing calculator, and it will give you 3 numbers. Put those in for a b and c and you have your equation to find the y for 7

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i don't have a graphing calculator. that's why i posted the question so someone could help.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok, do you know how to do augmented matrices?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i don't know how to do it at all. i have 5 questions on the assignment. and don't know how to do it. the online tutuorial doesn't explain how to do it very well or enough for me to figure it out.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Alright. Do you know what they are?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0What an augented matrice is?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0It is a table kind of that gives you the a,b, c of the quadratic equation. You have to get it to be 101a 010b 101c

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Your matrix would look like 4 2 1 450 16 4 1 143 100 10 1 869

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Now you have to solve and such to transform you r matrix into the one above

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you have to get the ones in the order of 2,1 3,1 3,2 2,3 1,3 1,2

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0correction of the order up above, it should be 1 0 0 A 0 1 0 B 0 0 1 C

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0to get the zeros, you have to do stuff like Row 1 x 25 ( multiply each number in row 1 by 25) and then row 1 + row 3=Row 3 so the first number in row 3 cancels out to 0. and then you can divide row 1 by 25 to get the original row again. But make sure when you add rows you add all of the numbers to the corresponding numbers.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You keep doing this to each place where you need a zero but make sure you don't lose any zeros making new zeros otherwise you'll get a continuous loop of math

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you do this to get all the zeros. so next you would do row 1 x 5 and then add it to row 3 to cancel out the 10 and make it 0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0there's no easier way to find the answer?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0only if you have a graphind calculator

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0now try solving for the third zero

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Unless I'm missing something, can't the initial equations: 45 = (2^2)a+2b+c 143 = (4^2)a + 4b + c 869 = (10^2)a + 10b + c ...be solved in about 5 lines with normal Gaussian elimination? I may, of course, have misunderstood the setup of this, so feel free to correct me.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I have never heard of gaussian before

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0you should gett the second zero by multiplying r1 x 4 and then adding it to r2.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0'Gaussian elimination' is just a fancy way of saying use two equations to eliminate c, then the others to eliminate a or b, and then you have one. put that back in... Matrices are good in theory but almost always terribly laborious in practice if it's not a computer doing it. To start: 45 = (2^2)a+2b+c (*) 143 = (4^2)a + 4b + c (**) 869 = (10^2)a + 10b + c (***) (**)  (*) => 98 = 12 a + 2b (***)  (**) => 726 = 84a + 6b Repeat for these two and you have it done.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0would you be willing to help me with the 5 questions?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Are they all a similar thing? Because if so seeing one should help you to do the others, but I could offer you more advice if you need it I guess. As there are 4 more I may just finish this one off for you: Carrying on: 98 = 12 a + 2b (1) 726 = 84a + 6b (2) (2) = 3 x (1) => 432 = 48 a => a = 9. It follows that b = ... and c = ....

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0well it's not so much of advice, i have no idea how to do it.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0OK post one more and I'll see what I can do to help. But I'm going to assume whatever you have to do, matrices is not it.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i can't. it only shows one question at a time

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0OK  do you need to give the answer to get the next one?  Well if you solve the equations as above, you should find a = 9, b = 5 c = 19 So the quadratic is "Cost = 9x^2  5x + 19", where x is the number of calculators. See if you can work out the cost of 7.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0that was correct. so do you think you could help with the others

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Yes I probably can help for a bit if you post the next one, but I will try a little more this time to help you get the answer instead of giving it, so then you should be able to do the rest.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0After a second, the rock is 58 feet in the air; after two seconds , it is 112 feet in the air. find the height, in feet, of the rock after 10 seconds.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Does it say you have to use a quadratic like before, or is this linear or something? It effects how you go about it.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0quadratic. they all are.
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