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Posted by **Miley** on Monday, February 7, 2011 at 7:40pm.

Please i need help

- Math7 -
**helper**, Monday, February 7, 2011 at 7:49pmx = number of cookies

x - (1/2 x + 3 + 2) = 7

x - (1/2 x + 5) = 7

2/2 x - 1/2 x - 5 = 7

1/2 x - 5 = 7

1/2 x = 12

multiply both side by 2

x = 24

- Math7 -
**Miley**, Monday, February 7, 2011 at 7:55pmThank you!

I did one exercise and could you please check it

The temperature at 2:00 P.M was 19C. By midnight, it was -3C

What is the difference in the temperatures?

_____________=________

I thing the answer is:

(+19)-(+22)=-3

Correct?

- Math7 -
**Miley**, Monday, February 7, 2011 at 8:11pmCorrect?

- Math7 -
**Ms. Sue**, Monday, February 7, 2011 at 8:25pmHow can a difference between 19 and - 3 be only 3 degrees?

- Math7 -
**helper**, Monday, February 7, 2011 at 8:25pmFrom 19C to -3C is 22 degrees difference

- Math7 -
**Miley**, Monday, February 7, 2011 at 8:46pmThank you!!

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