math

posted by christine

2. Simplify. Please be sure to show all of your work.
-3(-9) – |-5 – 3


3. Simplify. Please show all of your work
9c^3+7c-(3c^3-12+c)

4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work


5. Solve the following equation for z. Please show all of your work.
x=1/25(22z-9w)


6. Solve -14x -7(4-7) <(2x-15) . Write your solution using set builder notation. Please show all of your work
7.
Solve. Please show all of your work.
During one year, the Hills' real estate bill included $413 for miscellaneous services. Of this amount, 8% went to the local homeless shelter. How much money did the homeless shelter receive?

8. Solve. Please show all of your work.
Find the length and width of a rectangular lot with a perimeter of 108 meters if the length is 8 meters more than the width.

9. 9. Solve. Please show the algebraic inequality you used and show all of your work.
The Lido Company rents copy machines for a monthly charge of $300 + 10 cents per copy. The Lumsden Company rents copy machines for a monthly charge of $500 + 3 cents per copy. How many copies make the Lido Company more expensive than the Lumsden Company?

  1. Ms. Sue

    Jiskha is NOT a dumping ground for homework. We help students, but we do not do the work for them. If you continue posting a lot of questions with no work shown, you may be banned from posting here.

    Also see Writeacher's message to you earlier today.

    http://www.jiskha.com/display.cgi?id=1313421001

  2. Henry

    2. I'm assuming you meant:

    -3(-9) - [-5-3] =
    27 - 8 = 19.

    3. 9c^3 + 7c -(3c^3-12+c) =
    9c^3 + 7c - 3c^3 + 12 - c =
    6c^3 + 6c + 12 =
    6(c^3 + c + 2).

    4. Similar to # 3.

    5. x = 1/25(22x - 9w) =
    Multiply both sides by 25:
    25x = 22x - 9w,
    25x - 22x = 9w,
    3x = 9w,
    X = 3w.

    6. -14x - 7(4-7) < (2x-15)
    -14x + 21 < 2x-15
    -14x - 2x < -15 - 21,
    -16x < -36,
    X > -36/-16,
    X > 2 1/4.

  3. Henry

    7. 0.08 * $413 = $33.04

    8. Width = X-Met3rs.

    Length = (x+8) Meters.

    2x + 2(x+8) = 108m.
    2x + 2x + 16 = 108,
    4x = 108 - 16 = 92,
    X = 23m = Width.

    X+ 8 = 31m = Length.

    9. 0.1x + 300 > 0.03x + 500,
    0.1x - 0.03x > 500 - 300,
    0.07x > 200,
    X > 2857 Copies.

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