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
17
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
Heoughttoattendthemeeting,______?A、shouldheB、oughtheC、shouldn’theD、c
Completethenotesbelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeac
DistanceLearninginBritainIntimesofinflation,
A—feedbackJ—dataprocessingB—floppydiskK—datacaptureC—checkdigitL—
某厂锅炉房安装了两台燃煤链条蒸汽锅炉,采用多管旋风除尘器,除尘效率85%,因附近
体格检查既是诊断疾病的必要步骤,也是积累临床经验的过程,体格检查时应注意的事项有
可出现发热伴眼结膜充血的是A:尿路感染 B:支气管肺炎 C:流感 D:流行
在产品存续期间,如果标的指数下跌幅度突破过20%,期末指数上涨5%,则产品的赎回
甲企业编制7月份A产品的生产预算,预计销售量是50万件,6月末A产品结存10万件
一座桥形接线的35kV变电所,若不能从外部引入可靠的低压备用电源,考虑所用变压器
最新回复
(
0
)