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March 25, 2017

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1. (9m + 6) + (–5m – 6)

4m + 12
14m + 12
14m – 12
4m


2. (3r^2 + 7r + 1) + (4r^2 – 8r – 2)

7r2 + 15r – 1
7r2 – r – 1
7r2 – 15r – 3
–r2 – r – 1

3. (6h + 1) – (9h + 4)

–3h – 3
15h – 5
–3h + 3
–3h + 5

4. (–7w^2 – 2w – 1) – (–5w^2 + 3w – 2)

12w^2 + 5w + 1
–2w^2 – 5w – 1
–2w^2 – 5w + 1
–12w^2 – 5w – 3

My answers:
1. 14m + 12
2. 7r2 – r – 1
3. 15h – 5
4. –12w^2 – 5w – 3

  • Math help please - ,

    1, 3, and 4 are wrong.

    Please go back and study working with negative numbers.

  • Math help please - ,

    ok

    is #4 "-2w^2 - 5w + 1"?

  • Math help please - ,

    I agree with Ms. Sue. Negative number play seems to be the problem with the incorrect problems.

  • Math help please - ,

    4 is right now.

  • Math help please - ,

    1 D
    2 B
    3 A
    4 C
    5 C

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