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anonymous

  • one year ago

help!

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  1. anonymous
    • one year ago
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    yes

  2. anonymous
    • one year ago
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  3. anonymous
    • one year ago
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    yes @geny55 ?

  4. anonymous
    • one year ago
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    is this a pretest?

  5. anonymous
    • one year ago
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    @Astrophysics

  6. Astrophysics
    • one year ago
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    Perimeter is the distance around the 2d shape, so |dw:1433638990215:dw| add all the numbers for the perimeter and the area of a rectangle is just length x width\[Area = l \times w\] once you have that you can multiply both of them by 7.5.

  7. anonymous
    • one year ago
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    so i do 6+6+8+8? @Astrophysics

  8. Astrophysics
    • one year ago
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    Yes that's the perimeter

  9. Astrophysics
    • one year ago
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    But you must multiply it by 7.5 for the scale factor

  10. anonymous
    • one year ago
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    i got 210

  11. Astrophysics
    • one year ago
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    Sounds good, now find the area

  12. anonymous
    • one year ago
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    how

  13. anonymous
    • one year ago
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    ??

  14. Astrophysics
    • one year ago
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    Read what I've said above

  15. anonymous
    • one year ago
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    whats the area?

  16. anonymous
    • one year ago
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    210?

  17. Astrophysics
    • one year ago
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    No that's the perimeter, the area of a rectangle is length multiplied by the width.

  18. anonymous
    • one year ago
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    and whats the length and width

  19. anonymous
    • one year ago
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    @Astrophysics

  20. Astrophysics
    • one year ago
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    You should really know this by now, |dw:1433640168475:dw| Note that the scale factor for area, the change in area is equal to the scale factor squared, which means the scale factor for area is \[7.5^2\]

  21. anonymous
    • one year ago
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    so its 6 x 8

  22. Astrophysics
    • one year ago
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    That's for the unscaled rectangle, yes.

  23. anonymous
    • one year ago
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    so thats the length x width

  24. Astrophysics
    • one year ago
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    Yes

  25. anonymous
    • one year ago
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    ok so whats the area

  26. Astrophysics
    • one year ago
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    I feel as if you're ignoring everything I've said

  27. anonymous
    • one year ago
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    im not I'm learning :) @Astrophysics

  28. anonymous
    • one year ago
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    i got d

  29. Astrophysics
    • one year ago
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    ok

  30. anonymous
    • one year ago
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    am i right? @Astrophysics

  31. Astrophysics
    • one year ago
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    How did you get the area?

  32. anonymous
    • one year ago
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    area = 6 x 8 6 x 7.5= 45 8 x 7.5= 60 is that right? @Astrophysics

  33. Astrophysics
    • one year ago
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    Not quite, nice try though. Remember what I said to note earlier: `Note that the scale factor for area, the change in area is equal to the scale factor squared, which means the scale factor for area is`\[7.5^2\]

  34. Astrophysics
    • one year ago
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    \[area = l \times w \times 7.5^2\]

  35. anonymous
    • one year ago
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    i got 2,700

  36. Astrophysics
    • one year ago
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    Good!

  37. anonymous
    • one year ago
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    yay!

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