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nee5277

  • 2 years ago

Someone please help me to study for my test with this review packet!! :)

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  1. tictac4456
    • 2 years ago
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    ill help or shall i say ill try

  2. tictac4456
    • 2 years ago
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    brb

  3. nee5277
    • 2 years ago
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    \[5^{2}+7^{2}=x^{2} under that is, 25+49=x^{2}, below that is \sqrt{79}=\sqrt{x}^{^{2}} what does x^{2}=?\] & thanks ^.^

  4. nee5277
    • 2 years ago
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    I wish I could show a pic, it's Pythagonean and Theorem.

  5. hartnn
    • 2 years ago
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    you want to learn pythagoras theorem or u want to know how \(x=\sqrt{79}\) ??

  6. hartnn
    • 2 years ago
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    and x^2 = 25+49 = 74

  7. hartnn
    • 2 years ago
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    not 79

  8. nee5277
    • 2 years ago
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    Sorry I meant 74, but I wanted to know the answer to it because there are 4 answers, 1)6.3 2)7.1 3)14.1 & 4)17.1

  9. hartnn
    • 2 years ago
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    then u need to post the entire question clearly....

  10. hartnn
    • 2 years ago
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    because sqrt 74 = 8.6

  11. nee5277
    • 2 years ago
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    The end of the dog's leash is attached to the top of a 5-foot-tall fence post, as shown in the diagram below (this is where the equation is) The dog is 7 feet away from the base of the fence post.

  12. hartnn
    • 2 years ago
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    |dw:1356724058436:dw| whats need to be found ?

  13. hartnn
    • 2 years ago
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    if x is to be found, its 8.6

  14. nee5277
    • 2 years ago
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    Okay thanks, how about the legs of an isosceles right triangle each measure 10 inches. WHat is the length of the hypothesis of this triangle, to the nearest tenth of an inch?

  15. hartnn
    • 2 years ago
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    again pythagoras theorem |dw:1356724579218:dw|

  16. nee5277
    • 2 years ago
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    Answers are 6.3,7.1,14.1, and 17.1 Would it be 14.1?

  17. hartnn
    • 2 years ago
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    yes :) did u understand how ?

  18. nee5277
    • 2 years ago
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    Lol no honestly, I need help, it was just a lucky guess for me because I knew the answer had to have a four in it right?

  19. hartnn
    • 2 years ago
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    For any right angled triangle, |dw:1356724844491:dw|

  20. hartnn
    • 2 years ago
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    did u get that ?

  21. hartnn
    • 2 years ago
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    u had a=b=10 \(c^2=10^2+10^2=200 \\ c=\sqrt{200}=14.1\)

  22. hartnn
    • 2 years ago
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    which part u have doubt with ??

  23. nee5277
    • 2 years ago
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    Oh okay I see now thanks :) What is the value of x? \[13x-2(x+4)=8x+1\]

  24. nee5277
    • 2 years ago
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    So then I would start with 11x-2x+8=8x+1 right?

  25. nee5277
    • 2 years ago
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    Then add 2x to both sides? 2x+2x, 2x+8x

  26. hartnn
    • 2 years ago
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    -2(4)=-8 and not +8

  27. nee5277
    • 2 years ago
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    I'm lost at this part 11x-2x+8=8x+1 +2x +2x 11x+8=10x+1 -10x -10x?

  28. hartnn
    • 2 years ago
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    sorry, got disconnected \(13x-2(x+4)=8x+1 \\ 13x-2x\large \color{red}{+8}=8x+1 \\11x+8=8x+1 \\ 11x-8x =1-7 \\ 3x=-6 \\x=....?\) ask if there is any doubt in any step...

  29. nee5277
    • 2 years ago
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    I get it so the answer would be 2?

  30. nee5277
    • 2 years ago
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    If 3(x+2)-2(x+1)=8 the value of x is? I need help pls.

  31. hartnn
    • 2 years ago
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    sorry, i did the same mistake again \(13x-2(x+4)=8x+1 \\ 13x-2x\large \color{red}{-8}=8x+1 \\11x-8=8x+1 \\ 11x-8x =1+8 \\ 3x=9 \\x=3\)

  32. nee5277
    • 2 years ago
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    It's okay :)

  33. nee5277
    • 2 years ago
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    would be 4 right?

  34. hartnn
    • 2 years ago
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    3(x+2)-2(x+1)=8 3x+6-2x-2=8 x+4=4 x=4 yes :)

  35. hartnn
    • 2 years ago
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    *x+4=8

  36. nee5277
    • 2 years ago
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    Wait for that last one wouldn't it be 2 because 3 goes into 6 twice?

  37. Nimi404
    • 2 years ago
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    Pls solve this someone has a container with 4200 millilitre of waters are in someone's container

  38. hartnn
    • 2 years ago
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    sorry, i didn't get your doubt ? 3x=9 so, x=3

  39. nee5277
    • 2 years ago
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    Oh oh I see sorry lol it looked like a 6 for a minute. thanks. How about Debbie solved a linear equation 3(x+4)-2=16 where did she make an error? Line 1: 3(x+4)-2=16 Line 2: 3(x+4)=18 Line 3: 3x+4=18 Line 4: 3x=14 Line 5: \[4\frac{ 2}{ 3 }\]

  40. nee5277
    • 2 years ago
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    Oops sorry Line 5 is suppose to say x= then what I put.

  41. hartnn
    • 2 years ago
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    3(x+4)=18 x+4 = 18/3 =6

  42. hartnn
    • 2 years ago
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    so, mistake in line 3, while distributing.

  43. hartnn
    • 2 years ago
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    if more Q coming up, then close this and ask it in a new post...

  44. nee5277
    • 2 years ago
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    Okay thanks.

  45. hartnn
    • 2 years ago
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    welcome ^_^

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