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

Yuki made cookies on Monday. Some friends came over and ate half the cookies on Tuesday. On wednesday,Yuki ate three cookies, and on Thursday, she took two cookies to school. By Friday, Yuki had seven cookies left. How many did she bake on Monday?

Please i need help

- Math7 -
**helper**, Monday, February 7, 2011 at 7:49pm
x = 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 7:55pm
Thank 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 8:11pm
Correct?

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

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

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

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