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babybats Group Title

Engineers use three-dimensional coordinates to design construction projects. An overhead light is anchored at point (7, 12, 10) in a design where the floor of the building is represented by the two-dimensional coordinate plane (x-axis and y-axis). Measurements are in feet. 1. Lights are spaced from the hanging light, 4 feet away in the x-direction and 4 feet in the y-direction. Select the possible coordinates of the anchors for two other lights. a. (3, 8, 10) and (11, 16, 10) b. (3, 8, 6) and (11, 16, 14) c. (3, 12, 10) and (11, 12, 10) d. (7, 8, 10) and (7, 16, 10)

  • one year ago
  • one year ago

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  1. jcd2012 Group Title
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    I think, in the answer, 10 should be the number for z in (x,y,z), because the height of the ceiling remains constant. so I think what you're looking for, is two other lights that are 4 feet away in x and y, but still at 10 for z

    • one year ago
  2. babybats Group Title
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    so like x has to be four away from y???

    • one year ago
  3. jcd2012 Group Title
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    no. think of x and y as independent. the directions say we want lights that are 4 feet away in x, and 4 feet away in y, but constant at 10 in z. so if we have one light at the point (7,12,10), where can we put more lights?

    • one year ago
  4. babybats Group Title
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    ooooh, so itll be 11, 16. 10?

    • one year ago
  5. jcd2012 Group Title
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    that's one of them. we can also go the other way and say we want a light at (3,8,10) since that meets our requirements too

    • one year ago
  6. babybats Group Title
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    oh, okay! thanks! i have another question think you might be able to help?

    • one year ago
  7. jcd2012 Group Title
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    sure

    • one year ago
  8. babybats Group Title
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    |dw:1349720812748:dw|

    • one year ago
  9. babybats Group Title
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    The roof lines of a building can be described by the system of equations below, where the floor is represented by the x-axis and the y-axis and the height of the building is along the z-axis. Measurements are in feet.

    • one year ago
  10. jcd2012 Group Title
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    what do you need to do with this?

    • one year ago
  11. babybats Group Title
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    i have to find xyz, i suck at algebra 2 :c sorry lol

    • one year ago
  12. jcd2012 Group Title
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    that's okay. there's one thing we can try called gaussian elimination. are you familiar?

    • one year ago
  13. babybats Group Title
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    nope...

    • one year ago
  14. jcd2012 Group Title
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    I'm working on the problem. were you taught how to do a problem like this using substitution?

    • one year ago
  15. babybats Group Title
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    i go to online school so it's kinda like they just give you a problem and you have to solve it on your own....

    • one year ago
  16. jcd2012 Group Title
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    alright. give me a sec. I can show you how to do it one way

    • one year ago
  17. babybats Group Title
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    alright

    • one year ago
  18. jcd2012 Group Title
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    I think you should probably put this into another question for other people to help you with - I can't remmeber quite how to do this the algebra 2 way

    • one year ago
  19. babybats Group Title
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    alright

    • one year ago
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