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
2024-01-12
33
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://www.tihaiku.com/zcyy/3354973.html
相关试题推荐
Iffandgaredistinctprimenumberslessthan10,whichofthefollowingcanno
Lotteryballsnumberedconsecutivelyfrom1through100areplacedinaspinner.
Ifx,y,andwarenonzeronumbersandx-y=w,whichofthefollowingisequalto
If[img]2011q3/ct_egmatqm_egmatqchoose_0454_201121[/img]forallnumbersq,r,s
Ifathree-digitnumberisselectedatrandomfromtheintegers100to999,incl
Thereare450birdsatasmallzoo.Thenumberofbirdsis5timesthenumberof
Forany3givennumbers,whichofthefollowingisalwaysequivalenttoaddingt
Sixdifferentnumbersaretobeselectedfromthe(0,1,2,3,4,5,6)tocompos
Howmany3-digitnumbersbetween100and200haveadigitthatistheaverageof
Inacertaintwo-digitnumber,thetens’digitistripletheunits’digit,this
随机试题
Thepriceelasticityofdemandcurvefacedbyacompetitivefirmis______.A、0.
PeoplewhogrewupinAmericaandWesternEuropehavebecomeusedtotheidea
Languagesi
[originaltext]LosAngelesresidentKathleenMulcahyhasbeenfightingwith
黄体功能不足的临床特点为A.月经周期缩短,月经频发 B.月经周期正常,经期延长
下列哪种情形可放置宫内节育器A.月经过多、过频 B.生殖道急性炎症 C.子宫
某网友将小明的家庭住址、电脑号码登在公共论坛上,这侵犯了小明的哪项权利()A.人
下列关于环境目标说法正确的是()。A、环境目标就是指基本能满足区域社会经济活动
根据团队在社会服务机构中的不同( ),团队结构可以分为问题解决型团队和跨专业团
下面是某求助者的SCL-90测验结果: 从测验结果来看,该求助者的临床症
最新回复
(
0
)