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Rachel98 Group Title

Check my answer? I needed to make these equations into y = mx + b form: 42x - 4y = 3, 21x = 2y - 3, and 21x = y + 3/2. My answer for #1: y = - 10.5x - (3/4). For #2: y = 10.5x + 1.5, For #3: y = - 21x + 3/2.

  • one year ago
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  1. phi Group Title
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    you are getting the wrong signs on answers #1 and #3

    • one year ago
  2. Rachel98 Group Title
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    What do you mean by signs?

    • one year ago
  3. phi Group Title
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    42x - 4y = 3 can you do this one step by step ?

    • one year ago
  4. Rachel98 Group Title
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    I subtract 42x from both sides and get - 4y = - 42x + 3, then I divide everything by - 4, to isolate y and get y = - 10.5x - (3/4).

    • one year ago
  5. phi Group Title
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    sounds good, except -42x/-4 is not -10.5x

    • one year ago
  6. phi Group Title
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    minus over minus makes a positive

    • one year ago
  7. Rachel98 Group Title
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    It's positive 10.5, just realized my mistake.

    • one year ago
  8. phi Group Title
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    that's what I meant by getting the wrong sign

    • one year ago
  9. Rachel98 Group Title
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    Okay, thanks.

    • one year ago
  10. phi Group Title
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    for the last question 21x = y + 3/2 subtact 3/2 from both sides 21x - 3/2 =y or y = 21x -3/2

    • one year ago
  11. Rachel98 Group Title
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    Thanks

    • one year ago
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