(300- 100)÷20= 10 m/min;

Let the analytical formula of OA be y=kx, as can be seen from the meaning of the question

k= 15，

So the analytical formula of OA is: y = 15x.

When x=2,

y= 15×2=30，

B=30 meters.

Answer (2, 30).

(300-30)÷( 10×3)=9,

Then t = 9+2 = 1 1.

Then b (1 1, 300)

So the answer is:10,30, 1 1.

(2) Let the analytical formula of AB be y=k 1x+b 1, and the analytical formula of CD be y=k2x+b2.

30 = 2k1+b1300 =1k1+b1① or 100 = b2300 = 20k2+b2②,

Solution: k 1 = 30b 1 =? 30? What's your comment on this answer? Put away comments//high quality or satisfaction or special types or recommended answers dottimewindow.iperformance & window.iperformance.mark ('c _ best',+newdate); Lawyer recommendation service: If your problem has not been solved, please describe your problem in detail and provide free professional consultation through Baidu Law Professional Edition. Where will other similar questions 2014-01-01be held in Chongqing? 120 16-06-25 In order to build a healthy Chongqing and advocate green travel, on May 3 1 1 day, the first colorful bicycle lane in Chongqing was built in the northern new district of Chongqing. How to be a healthy Chongqing 2009-08- 18? Chongqing, where the whole people live a healthy lifestyle, urgently needs a review of the 2009- 10-2 1 military parade. & gt recommended for you: F.context('cmsRight', [{'URL':'/d01373f082025aaf511aa256e9edab64034f1a07? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId':'A24KA00562 '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； The price of electric cars has dropped many times. Is the quality guaranteed? What impact will the "network toilet" have? Is Huaqiang North's second-hand mobile phone reliable? Why is the cost of cancer treatment getting higher and higher? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 17 19627884；