问问?没看懂咋算出来的答案?Question #4:A cyclist bikes from town A to town B and back to town A in 3 hours.He bikes from A to B at a speed of 15 miles/hour,while his return speed is 10 miles/hour.What is the distance between the 2 towns?(a

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/01 07:07:58
问问?没看懂咋算出来的答案?Question #4:A cyclist bikes from town A to town B and back to town A in 3 hours.He bikes from A to B at a speed of 15 miles/hour,while his return speed is 10 miles/hour.What is the distance between the 2 towns?(a
xj@_e%fu5J {ekL-!NbhBs!j)9Y :Fz)f;b^xo;~e7Q>Yvr_?d>28D;`6v0 @P@d?<6논OA*>H0lnDD-76q|v*2Z[^C(*C`bXLFv@]tIt>qҽӴ~.saMUB(4F^Njytհ?ϏeZ֣iI_k_94t]Mޒ™}Kf4xTDD#W#ua2}:66&tiŵ ^x6-C(o-~-J1

问问?没看懂咋算出来的答案?Question #4:A cyclist bikes from town A to town B and back to town A in 3 hours.He bikes from A to B at a speed of 15 miles/hour,while his return speed is 10 miles/hour.What is the distance between the 2 towns?(a
问问?没看懂咋算出来的答案?
Question #4:A cyclist bikes from town A to town B and back to town A in 3 hours.He bikes from A to B at a speed of 15 miles/hour,while his return speed is 10 miles/hour.What is the distance between the 2 towns?
(a) 18 miles
(b) 15 miles
(c) 12 miles
(d) 10 miles
(e) 11 miles
Answer:The total time t = tAB + tBA = dAB/(15 miles/hour) + dAB/(10 miles/hour) = dAB/(6 miles/hour).
dAB = dAB/(6 miles/hour) · 3 hours = 18 miles.
(a) is the correct answer.
--------------------------------------------------------------------------------

问问?没看懂咋算出来的答案?Question #4:A cyclist bikes from town A to town B and back to town A in 3 hours.He bikes from A to B at a speed of 15 miles/hour,while his return speed is 10 miles/hour.What is the distance between the 2 towns?(a
a
假设A离B距离为S,从A到B花了a小时,B到A花了b小时
设三个方程：15a=10b=2s 15a+10b=2s a+b=3 得出S=18

问问?没看懂咋算出来的答案?Question #4:A cyclist bikes from town A to town B and back to town A in 3 hours.He bikes from A to B at a speed of 15 miles/hour,while his return speed is 10 miles/hour.What is the distance between the 2 towns?(a 附图 求图中画线部分是怎么算出来的 没看懂 这个题第一问问没看懂 解析也没看懂, 你的答案没看懂,解释一下好吗 答案没看懂. 碳酸氢钠与过量氢氧化钙反应生成什么因为在问问中搜索的答案没太看懂,所以麻烦大家帮忙再给我写详细一点, 幂级数,这个f(x)的n阶导数怎么算出来是这个的,没看懂.谁会 答案是18没看懂, 如图 2题 答案上的解析没看懂 第二问 答案划线的地方没看懂 答案是同学写的没看懂唉 为什么我算出来没答案 没看懂,看懂的说一下. 若平行四边形的一边长为2,面积为4√6,则此边上的高介于（）qwq不是要答案,就是这个题目没看懂……平行四边形不是底乘高吗?然而面积算出来是1.0… 怎么做的啊,我算出来没答案.函数题 我想问问空之境界的终章到底讲了什么,看了以后完全没看懂. 谁能告诉我这一步的原理?这题是怎么算出来的,没看懂,求学霸帮分析! 高数,第八题,答案没看懂,