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anonymous

  • 4 years ago

|dw:1328069828540:dw| The perimeter of the triangle shown is 370 meters. Find the length of each side. __meters,__meters, and __meters (type in integers or decimals, Use Ascending order)

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  1. anonymous
    • 4 years ago
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    |dw:1328070090110:dw|

  2. anonymous
    • 4 years ago
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    Hi jmallis, so can I assume that this is a right triangle?

  3. anonymous
    • 4 years ago
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    No looks more like|dw:1328070313875:dw|

  4. anonymous
    • 4 years ago
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    Got it, so, do you know how to set up your equation? We know the perimeter is 370 meters, so how do you think we'd set that up?

  5. anonymous
    • 4 years ago
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    370= 5x+ x +(6x-2)?

  6. anonymous
    • 4 years ago
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    Great job! So, now you can get rid of the parentheses (it's not relevant in addition) and add your factors.

  7. anonymous
    • 4 years ago
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    \[5x + x + 6x -2 = 12x -2 = 370\]

  8. anonymous
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    Does that make sense? So now you just have an equation with: \[12x - 2 = 370\]

  9. anonymous
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    Ok makes sense so far.

  10. anonymous
    • 4 years ago
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    Great, so do you know how to solve that equation you have left?

  11. anonymous
    • 4 years ago
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    This is what I do not understand.

  12. anonymous
    • 4 years ago
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    Ok, do you have much experience with algebra?

  13. anonymous
    • 4 years ago
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    Here and there.

  14. anonymous
    • 4 years ago
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    You plus 2 from 270?

  15. anonymous
    • 4 years ago
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    370*

  16. anonymous
    • 4 years ago
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    Exactly! You add 2 to 370. So now you have: \[12x = 372\]

  17. anonymous
    • 4 years ago
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    You know the next step?

  18. anonymous
    • 4 years ago
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    12x/12= 372/12?

  19. anonymous
    • 4 years ago
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    Brilliant, way to go - so 372 / 12 = 31. Which is your X

  20. anonymous
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    x=31

  21. anonymous
    • 4 years ago
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    So now what you need to do is put that x back into your three lengths from the original triangle, put em in order, and voila - you've got your answer

  22. anonymous
    • 4 years ago
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    In order meaning smallest to largest?

  23. anonymous
    • 4 years ago
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    Correct - you can put what you get here if you want so I can make sure I'm getting the same thing

  24. anonymous
    • 4 years ago
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    5, 155, 184 ?

  25. anonymous
    • 4 years ago
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    Well, let's go through them. You have 3 separate lenghts: x, 5x, and 6x-2. So, replace X with 31 for all of these

  26. anonymous
    • 4 years ago
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    Hint: You got the second two right ;)

  27. anonymous
    • 4 years ago
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    darn it 31

  28. anonymous
    • 4 years ago
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    Haha, no worries. And great job jmallis - appreciate you sticking in there and getting it. Great work!

  29. anonymous
    • 4 years ago
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    Thanks

  30. anonymous
    • 4 years ago
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    Can you help me with another problem I only have like 9 minutes battery life on my laptop. Lakeview is 85 miles from Springfield. Irania must go to the law library in Springfield to get a document for the law form for which she works. Find how long it takes her to drive round trip if she averages 54 mph. Takes approximately __ hours and __minutes

  31. anonymous
    • 4 years ago
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    Ok, so - 54 mph. So, take the total mileage (85 miles) and divide that by 54 mph. That gives you the approximate time to get there. REMEMBER though that this is one-way, you need to multiply your answer by 2 to get the round trip. Hopefully you get this in time...

  32. anonymous
    • 4 years ago
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    so whats hours and minutes? and thank-you again

  33. anonymous
    • 4 years ago
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    hey, so the key is that when you divide, you'll come up with a decimal. You need to multiply that decimal by 60 - in order to give you the mins

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