### scribe post

Wednesday, October 22, 2008
today in class we learned how to simplify or group like terms. For example if you have a question like this (-2) + (+8) + (-6) + (+4) = the way you simplify it is add up the negative integers in a group then add up the positive integers in a group once you do that the question should look like this (-8) + (+12) = 4.

Below are questions 6 - 10 from page 44

6. A certain stock starts at 319 points, gains 55 points, drops 45 points, and drops 28 points.

(+319) + (+55) + (-45) + (-28) = (+374) + (-73) = 301

7. An elevator starts on the 9th floor, descends 5 floors, and ascends 9 floors.

(+9) + (-5) + (+9) = (+18) + (-5) = 13

8. A helium filled ballon is released, gain 53m, drops 32m, gains 47m, and drops 38m

(+53) + (-32) + (+47) + (-38) = (+100) + (-70) = 30

9. An airplane takes off. gains 955m, gains another 273m, drops 36m and drops 49m

(+955) + (+273) + (-36) + (-49) = (+1228) + (-85) = (+1143)

10. The temperature starts at 18c, drops 4c, rises 22c, drops 6c, and gains 6c

(+18) + (-4) + (-22) + (-6) + (+8) = (+48) + (-10) = (+38)