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anonymous

  • one year ago

The variable Z is inversely proportional to X. When X is 3, Z has the value 2. What is the value of Z when X = 13

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  1. anonymous
    • one year ago
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    @Nnesha can you help?

  2. Nnesha
    • one year ago
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    do you know the definition of inverse proportion ?

  3. Nnesha
    • one year ago
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    i mean formula*

  4. anonymous
    • one year ago
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    i know to do it , its just the decimals get me confused. 2/3 is what? then whatver that is i just multiply it by 13

  5. insa
    • one year ago
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    As z is inversely proportional to x. Then z=k/x substitute the values of z and k and find the value of k

  6. Nnesha
    • one year ago
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    you don't have to divide Z = k/ z substitute z and k values and x is dividing by k so you need to do opposite of division

  7. insa
    • one year ago
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    After finding the value of k, let z=k/x. Then substitute the value of k u found and the other value of k, solve it further and you'll get the answer :)

  8. anonymous
    • one year ago
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    so is the answer 78?

  9. Nnesha
    • one year ago
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    k equal to what ?

  10. Nnesha
    • one year ago
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    k is constant of variation first you need to solve for k \[\huge\rm \color{reD}{z}=\frac{ k }{ \color{blue}{x} }\] \[\color{ReD}{z =2}~~~~\color{blue}{x=3}\]

  11. anonymous
    • one year ago
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    so then itll be 2=26?

  12. anonymous
    • one year ago
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    or is it 6?

  13. Nnesha
    • one year ago
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    yes k=6 now use the same formula substitute k and z values solve for z

  14. anonymous
    • one year ago
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    so then its 2=2

  15. Nnesha
    • one year ago
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    how ?

  16. anonymous
    • one year ago
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    2=6/3 ?

  17. Nnesha
    • one year ago
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    no you need to find z when x =13 this is 2nd part so substitute 13 for x

  18. anonymous
    • one year ago
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    so 2=6/13?

  19. Nnesha
    • one year ago
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    no u need to find z so it should be z =6/13

  20. anonymous
    • one year ago
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    0.461?

  21. Nnesha
    • one year ago
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    yeah or leave it as fraction form

  22. Nnesha
    • one year ago
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    .4615 ^round it

  23. anonymous
    • one year ago
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    0.462

  24. Nnesha
    • one year ago
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    lO_Oks right

  25. anonymous
    • one year ago
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    i need one more The variable Z is directly proportional to X, and inversely proportional to Y. When X is 6 and Y is 3, Z has the value 6. What is the value of Z when X = 10, and Y = 8

  26. Nnesha
    • one year ago
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    directly proportional = y =kx multiply k with x inverse = y = k/x divide k by x so translate that into the equation

  27. Nnesha
    • one year ago
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    is means equal sign so z =

  28. anonymous
    • one year ago
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    so multiply 6x6 and 6x3

  29. Nnesha
    • one year ago
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    6 times 6 ? there is only one 6

  30. Nnesha
    • one year ago
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    The variable Z is directly proportional to X z= kx and 2nd part is inversely proportional to Y so z =kx/y

  31. Nnesha
    • one year ago
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    substitute x,y and z values solve for k

  32. anonymous
    • one year ago
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    so what do i do first?

  33. Nnesha
    • one year ago
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    substitute x ,y and z values solve for k

  34. anonymous
    • one year ago
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    im so confused

  35. Nnesha
    • one year ago
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    why ? what you didn't understand :=)

  36. anonymous
    • one year ago
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    i substitued and got 10 and 16

  37. Nnesha
    • one year ago
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    so how did you get 10 please show your work so i can figure t out ur mistake :=)

  38. anonymous
    • one year ago
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    oh wait no , i got 60 and 24

  39. Nnesha
    • one year ago
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    work ?

  40. Nnesha
    • one year ago
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    k= ?

  41. anonymous
    • one year ago
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    all i did was multiply 10 by 6 and 8 by 3

  42. Nnesha
    • one year ago
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    When X is 6 and Y is 3, Z has the value 6. this is first part you need to find k value first ALWAYS!

  43. Nnesha
    • one year ago
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    substitute x for 6 y for 3 z for 6 solve for k

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