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anonymous
 one year ago
If the range of the function f(x)= 5x − 3 is {13, 8, 3, 12, 17}, what is its domain?
I am confused with the 5x3, can someone help?
anonymous
 one year ago
If the range of the function f(x)= 5x − 3 is {13, 8, 3, 12, 17}, what is its domain? I am confused with the 5x3, can someone help?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@iCake @ICanAwnserQuestions

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1The range is the set of possible outputs. So it's saying that the set of possible outputs are 13, 8, 3, 12, 17

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah i get that what i dont get is the 5x3

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1it wants the corresponding inputs for each output so say the output is y = 13 that means y = 5x  3 13 = 5x  3 13+3 = 5x 10 = 5x 5x = 10 x = 10/5 x = 2 So if the output is y = 13, then the input is x = 2

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you will do this for the other outputs to get the domain

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh now i get it thanks!!! :D

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you're welcome

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what did you get? i get 2,1,0,1,2

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1I don't agree with 1 or 2 but the "2,1,0" part is correct

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay let me try it again

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i dont get it what i have to do with the y=13 and x2 @jim_thompson5910

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1do you see how I plugged in y = 13 and solved to get x = 2 ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah but i dont undersand it that much

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1well the idea is that if you plug in x =2, you'll get y = 13 out they want you to think in reverse. If y = 8 is the output, then what must the input be?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1yep because y = 5x3 y = 5*(1)  3 ... replace x with 1 y = 5  3 y = 8 so this shows how if x = 1 is plugged in, then y = 8 pops out

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1I'll be right back

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1So do you see how plugging in x = 1 gives y = 8?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1and if y = 3, then what must x be?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1let's check y = 5x3 y = 5*2  3 ... replace x with 2 y = 103 y = 7 so if x = 2, then y = 7 but we want y = 3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i get it! thank you! I have 4 questions more can you help me? its for a home test

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1I can't help with tests

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0its practically a homework and its the last 4 questions that i have trouble with :/

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1Ok I'll help with 2 of them if it's a hw. Which 2 are giving you the most trouble?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0widget wonder produce widgets. They have found that the cost,c(x), of making x widgets is a quadratic function in terms of x. The company also discovered that it cost $16 to produce 2 widgets, $18 to produce 4 widgets, and $48 to produce 10 widgets. Find the total cost of producing 6 widgets.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i am so bad at that kind of problems like the paraghrap @jim_thompson5910

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1ok let me look through it

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1do you have a TI calculator (like a TI83 or TI84) ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no :/ but cellphone work? or a scientific calculator?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1the cellphone won't work because we need to do quadratic interpolation

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1let me find a calculator

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0okay thanks for your effort and your time ;) :D

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1ok I found this page http://www.solvemymath.com/online_math_calculator/interpolation.php you will type in [2,16], [4,18], [10,48] and hit calculate. Tell me what comes up

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0it appear this: http://solvemymath.com/calc_data/draw_data/cache/be7017ac8ee524153679ac985295e596.png

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1I got that as well

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1now you plug x = 6 into that function to get your final answer

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thas what i dont get because it a big division

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1\[\Large f(x) = \frac{x^24x+36}{2}\] \[\Large f(6) = \frac{6^24(6)+36}{2}\] \[\Large f(6) = \frac{364(6)+36}{2}\] \[\Large f(6) = \frac{3624+36}{2}\] \[\Large f(6) = \frac{12+36}{2}\] \[\Large f(6) = \frac{48}{2}\] \[\Large f(6) = 24\]

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1So this means it costs $24 to make 6 widgets

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ohh okay so i always going to subsitute the x for its value

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and how do you get that list of numbers? like this one that you type [2,16], [4,18], [10,48] @jim_thompson5910

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1Given: "The company also discovered that it cost $16 to produce 2 widgets, $18 to produce 4 widgets, and $48 to produce 10 widgets." "it cost $16 to produce 2 widgets" means x = 2 and y = 16 "$18 to produce 4 widgets" means x = 4 and y = 18 "$48 to produce 10 widgets" means x = 10 and y = 48

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1all that means we know (2,16), (4, 18) and (10,48) all lie on this parabola

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and how you know which ones where on the same parentesis

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1what do you mean?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0some of the numbers where in the same parenthesis

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh nevermind i get it. thanks for your help! i have to go Thanks a lot!!

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1alright I'm glad it's making sense now
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