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freemap

  • one year ago

The width of a rectangle is 8 cm less than its length. The perimeter of the rectangle is 52 cm. What is the width of the rectangle? A. 7 cm B. 9 cm C.15 cm D. 17cm

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  1. freemap
    • one year ago
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    @jim_thompson5910

  2. jim_thompson5910
    • one year ago
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    `The width of a rectangle is 8 cm less than its length` if the length is L, then what is the width in terms of L?

  3. freemap
    • one year ago
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    W=L-8

  4. jim_thompson5910
    • one year ago
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    yes

  5. jim_thompson5910
    • one year ago
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    now we use the perimeter of a rectangle formula P = 2L + 2W

  6. jim_thompson5910
    • one year ago
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    replace P with 52 replace W with L-8 doing this gives 52 = 2L + 2(L-8) now solve for L

  7. freemap
    • one year ago
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    Would you divide

  8. jim_thompson5910
    • one year ago
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    yes but not right away

  9. freemap
    • one year ago
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    l'm sorry but what would be L. Like the number I really don't understand

  10. jim_thompson5910
    • one year ago
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    L stands for the length it's unknown at this point, but when you solve for L, you figure out what the number for the length is

  11. jim_thompson5910
    • one year ago
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    example: if 2L = 10, then L = 5

  12. freemap
    • one year ago
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    52-2L =26

  13. jim_thompson5910
    • one year ago
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    what would 2(L-8) turn into?

  14. freemap
    • one year ago
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    2L -8

  15. freemap
    • one year ago
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    2L - 16 i mean

  16. jim_thompson5910
    • one year ago
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    so 52 = 2L + 2(L-8) turns into 52 = 2L + 2L-16

  17. jim_thompson5910
    • one year ago
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    then you combine the 2L terms 2L+2L = 4L making 52 = 2L + 2L-16 turn into 52 = 4L-16

  18. freemap
    • one year ago
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    Which now you divide by by 4 now?

  19. jim_thompson5910
    • one year ago
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    not yet

  20. freemap
    • one year ago
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    oh 16 + 52 is 68 and 68 divided by 4 is 17

  21. jim_thompson5910
    • one year ago
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    yep, L = 17

  22. freemap
    • one year ago
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    Thanks so much much could be check my other answer i'll post again so you ca get other medal

  23. jim_thompson5910
    • one year ago
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    since L = 17, the width is W = L-8 = 17-8 = 9

  24. freemap
    • one year ago
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    Thanks, i forgot about that part

  25. jim_thompson5910
    • one year ago
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    they put that trap in

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