Pre-Algebra

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1. 3w – 10w

13w
–7w
–7
7w

2. y + 2y +3z

2y + 3z
3y + 3z
2y2 + 3z
6yz

3. 6r + r – 5r

2r
1r + r
0r
7r – 5r

4. 5x + 2(x + 6)

7x + 6
7x2 + 12
7x + 12
7x (x + 6)

5. –3m + 3(m + 6)

6
–6m + 6
6m + 18
18

  • Pre-Algebra -

    I'm sorry I don't have any idea how to do this. When I try I come up with these numbers that are not one of the choices.

  • Pre-Algebra -

    I'll be glad to check your answers.

  • Pre-Algebra -

    1)
    3w – 10w = -7w

    5.
    –3m + 3(m + 6)

    Plus and minus 3m cancel out, leaving what?

  • Pre-Algebra -

    ? :(

  • Pre-Algebra -

    I'm confused.

  • Pre-Algebra -

    Don't you know what 3 times 6 is?

    I'm sorry. :-(

  • Pre-Algebra -

    Yeah! It's 18.

  • Pre-Algebra -

    Ohhhhhhhhhhhhhhhh I get it so....

    2 is 3y +3z
    3. 2r
    4. 7x + 12

    right

  • Pre-Algebra -

    Yay! You've got it. All are correct! :-)

  • Pre-Algebra -

    thanks!

  • Pre-Algebra -

    You're welcome.

  • Pre-Algebra -

    So you go it right? Cool!

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