首页
登录
职称英语
Bob has 40 coins consisting only of dimes and quarters. If the number of dimes i
Bob has 40 coins consisting only of dimes and quarters. If the number of dimes i
游客
2025-02-27
30
管理
问题
Bob has 40 coins consisting only of dimes and quarters. If the number of dimes is 10 more than twice the number of quarters, what is the total value of the coins.
选项
A、$9
B、$2.5
C、$3
D、$5.5
E、$12
答案
D
解析
dimes指10美分硬币,quarter指25美分硬币,假设quarters的数目为x,那么dimes的数目便是2x+10,根据题意有:x+2x+10=40,得到x=10,因此硬币总价值是30×0.1+10×0.25=5.5(美元)。
转载请注明原文地址:https://tihaiku.com/zcyy/3974600.html
相关试题推荐
Whatisthestandarddeviationofthethreenumbersx+5,y+5,z+5?(1)Thestanda
When-ofacertainnumberissubtractedfromthenumberandthenthisdifferenc
Rollinganumbercubewithfacesnumbered1to6(similartoa6-sideddie)isa
X,YareinasetwhichhaspropertyPthatanyrealnumberbetweenX,Yalsobe
WhichofthefollowingnumbersisNOTthesumofthreeconsecutiveoddintegers?
Ifd=123.4546,andd1isthenumberobtainedbyroundingdtothenearesthundre
Onaroadthereisatreeevery46meters.Ifthetreesarenumberedconsecutive
Whatistheleastnumberofdigits(includingrepetitions)neededtoexpress1.2
Therearefivepositivenumbersn+2,n+1,n-2,nandn+9,whichofthefollowing
Ifxisaprimenumber,whatisthevalueofx?(1)41<x<48(2)x+1isamultiple
随机试题
Cropscanbetradedonthefuturesmarketbeforetheyareharvested.Ifapoorc
Sincethefatherdiedayearago,therehasbeen______inthefamilyaboutthe
______isthecentralconcerntoBlake’sconcernintheSongofInnocenceandSo
Whichofthefollowingitalicizedpartsmodifiesanadverb?(2014)A、Iratherlike
作为雇员忠诚保证保险特别规定的发现期通常()。A.从保险合同终止时开始 B
关于地埋管地源热泵的表述,下列哪一项是正确的?A.只要所承担建筑冬季的热负荷与夏
不属于原发性头痛的是A.偏头痛 B.紧张性头痛 C.器质性头痛 D.丛集性
下列哪一项通常出现在运动员过度训练的早期() A.血压偏高 B
舒尔茨提出:“有技能的人力资源是一切资源中最重要的资源,人力资本投资大于物力资本
公安机关的任务从时间上分包括( )A.目前任务和长远任务 B.局部任务和全局
最新回复
(
0
)