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ShadowCain

  • one year ago

Which equation illustrates the division property of equality? A. d x 4 = 32 d x 4 / 4 = 32 / 4 d = 8 B. d - 4 = 32 d - 4 + 4 = 32 + 4 d = 36 C. d / 4 = 32 d / 4 x 4 = 32 x 4 d = 128 D. d + 4 = 32 d + 4 - 4 = 32 - 4 d = 28

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  1. ShadowCain
    • one year ago
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    I think it's C because 128 / 4 = 32

  2. jim_thompson5910
    • one year ago
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    division property of equality if a = b, then a/c = b/c where c is nonzero

  3. jim_thompson5910
    • one year ago
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    in more common language, you might say "divide both sides by ______" (replace the blank with a number or expression)

  4. ShadowCain
    • one year ago
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    128 / 4 x 4 = 128 32 x 4 = 128

  5. jim_thompson5910
    • one year ago
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    if we start with d x 4 = 32 we divide both sides by 4 to isolate d this is using the division property of equality

  6. ShadowCain
    • one year ago
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    They all come out as equal but C is the only one that is dividing. A is multiplication, B. is subtraction and D is adding.

  7. jim_thompson5910
    • one year ago
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    what you are showing (in choice C) is the multiplicative property of equality

  8. ShadowCain
    • one year ago
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    Well then I'm totally confused

  9. jim_thompson5910
    • one year ago
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    you don't start with dividing division is the second step

  10. ShadowCain
    • one year ago
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    So the division property of equality starts with the opposite, which would be multiplication.

  11. jim_thompson5910
    • one year ago
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    yeah because the goal is to undo the multiplication

  12. jim_thompson5910
    • one year ago
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    start with this |dw:1441679729880:dw|

  13. jim_thompson5910
    • one year ago
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    |dw:1441679749504:dw|

  14. ShadowCain
    • one year ago
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    Thanks

  15. jim_thompson5910
    • one year ago
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    no problem

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