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anonymous
 one year ago
Kitaer is a manager at a landscaping company. He has two workers to landscape an entire park, Cody and Kaitlyn. Cody can complete the project in 2 hours. Kaitlyn can complete the project in 1 hours. Kitaer wants to know how long it will take them to complete the project together.
anonymous
 one year ago
Kitaer is a manager at a landscaping company. He has two workers to landscape an entire park, Cody and Kaitlyn. Cody can complete the project in 2 hours. Kaitlyn can complete the project in 1 hours. Kitaer wants to know how long it will take them to complete the project together.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0really confused on this?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1x = time it takes for Cody to do the job alone y = time it takes for Kaitlyn to do the job alone z = time it take them to do the job together we're given x = 8 and y = 6. Solve for z \[\large \frac{1}{x}+\frac{1}{y}=\frac{1}{z}\] \[\large \frac{1}{8}+\frac{1}{6}=\frac{1}{z}\] \[\large \frac{3}{24}+\frac{4}{24}=\frac{1}{z}\] \[\large \frac{3+4}{24}=\frac{1}{z}\] I'll let you finish

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1\[\large \frac{3+4}{24}=\frac{1}{z}\] \[\large \frac{7}{24}=\frac{1}{z}\] cross multiply or take the reciprocal of both sides

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh! Okay :) Sorry, I didn't notice that

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1now fully isolate z

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Can I ask another please?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1sure, go ahead

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1what are some key features that you can think of? any at all?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you mean the degree of the polynomial?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1what does the degree tell us?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how many answers it would have

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1close, the degree tells us the maximum number of roots, or xintercepts, possible example: x^3 + 7x^2 + 9 has at most 3 roots. It could have 3 roots, or 2 roots, or just 1 root.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1the degree also tells us how many turning points there are number of turning points = (degree)  1 example: degree = 3 means we have 2 turning points dw:1437527865525:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1also, a degree 3 polynomial has 3 branches dw:1437527902361:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1other key features: * y intercept * end behavior

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1the end behavior is explained in these articles http://www.purplemath.com/modules/polyends.htm http://www.mathwords.com/e/end_behavior.htm

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ok! Thankyou<3 So the answer would be

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0basically we need degress, yintercepts, and end behaviors

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1knowing the degrees helps us determine how many roots max are possible it doesn't tell us the actual xintercepts

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you have to set the polynomial equal to 0 and solve for x

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1key features used to graph: xintercepts yintercept number of turning points (equal to degree  1) end behavior also, a couple of other points doesn't hurt either
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