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  1. M

    how to solve this: http://tinypic.com/view.php?pic=nlep9u&s=6?

    (9x + 5) + (3x + 1) = 90 12x + 6 = 90 12x = 84 x = 7
  2. M

    how to solve this: http://tinypic.com/view.php?pic=29on5nt&s=6?

    Solution is correct, although I have no idea how you got from 3x + 5 = 5x - 13 to 8x - 8 = 24 You should have started with: (3x + 5) + (5x - 13) = 24 8x - 8 = 24 8x = 32 x = 4
  3. M

    how to solve this: http://tinypic.com/view.php?pic=29on5nt&s=6?

    Solution is correct, although I have no idea how you got from 3x + 5 = 5x - 13 to 8x - 8 = 24 You should have started with: (3x + 5) + (5x - 13) = 24 8x - 8 = 24 8x = 32 x = 4
  4. M

    What is the answer to this math riddle?

    The dollar did not go anywhere. The friends each paid $9 for a total of $27 paid out The hotel has $25 and the bellhop has $2 for a total of $27
  5. M

    A sports car accelerates from 0 to 27m/s in 3.9s. What is the magnitude of the?

    average acceleration = (27 m/s - 0m/s) / 3.9s = (27m/s) / 3.9s = 6.923 m/s²
  6. M

    suki is enrolled in one data-management class at her school and leo is in

    P (Suki is selected from her class) = 2/5 P (Loe is selected from his class) = 2/4 P (Suki & Leo are both selected) = P (Suki is selected) * P (Leo is selected) = 2/5 * 2/4 = 1/5
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