Posted by **Jazzy** on Monday, February 13, 2012 at 6:54pm.

Combine like terms.

12.) 7r4 + 13r2 + 9r

13.) 3 - 4x - 15x - 6x - 1

Thanks to whoever helps me :D

- math -
**Reiny**, Monday, February 13, 2012 at 7:10pm
in 12.) , if your mean 7x^4 etc, then all 3 terms would be different and nothing else can be done

13.)

3-4x - 15x - 6x - 1

= 2 - 24x , just add up the x terms and the constants.

- math -
**Jazzy**, Monday, February 13, 2012 at 7:11pm
Thank you so much Reiny :D

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