maths problem

2013-11-29 4:41 am

......................12....................
<--------------------------------------------
*............................................*
*...........................7...............*
*..............------------------------------>
*.............*..............................*
*.............*..............................*
-------------------------------------------------------->
*.............*..............................*
a............-3.............................b

Referring to the diagram, what is the value of a - b?

a. -12 b. -4 c. 4 d. 12

if you have enough time, may i ask for you the formula?

thanks a lot!!! ^^

another things, i wanna ask how to post photo in yahoo question.

thanks for your help!

回答 (4)

Stardust

2013-11-29 5:46 am

✔ 最佳答案

圖片參考：http://imgcld.yimg.com/8/n/HA00981853/o/20131128213708.jpg

you should know that a < -3 < b

b-(-3)=7
b=4

4-a=12
a=-8

∴a-b
=-8-4
=-12

你要升上中學級才可上傳圖片，詳情可參考知識等級表

努力吧！

2013-11-28 21:51:54 補充：
唔知幅圖畫得岩唔岩呢?:P

👍 0 👎 0

[匿名]

2013-12-07 2:45 am

還是要去 http://aaashops。com 品質不錯，老婆很喜歡。
区叓叟召劵动呤

👍 0 👎 0