Bob has 40 coins consisting only of dimes and quarters. If the number of dimes i

游客2024-01-12 24

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/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

Muchas______,Icouldn’tlendhimthemoneybecauseIsimplydidn’thavethat
Imagineyourselfasawinner,______willmakegreatcontributionstoyourfuture
WhenWaltDisneywasdrawingonenight,hesuddenlyheardastrangesound.T
[img]2018m9s/ct_etoefz_etoeflistz_201808_0014[/img][br]Whatisthelecturemai
Wehavecompiledalistofthingsthatexpectantcouplesandnewparentscan
土的含水量的定义，正确的是（　　）。A.单位体积土的总质量中所含水的质量的比例
活髓牙钉洞同位型要求钉洞的深度一般为A.1mm B.0．5mm C.1．5m
患者，男，35岁。肛旁肿痛3天，持续加剧，伴有恶寒、发热、便秘、溲赤，肛周红肿，
中央银行窗口指导的主要特征是()。 A.限制存款增加额B.限制贷款增减额
下列选项中，属于施工方进度控制技术措施的是（） A.编制资源需求计划B.

最新回复(0)

Bob has 40 coins consisting only of dimes and quarters. If the number of dimes i

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

Muchas______,Icouldn’tlendhimthemoneybecauseIsimplydidn’thavethat

Imagineyourselfasawinner,______willmakegreatcontributionstoyourfuture

WhenWaltDisneywasdrawingonenight,hesuddenlyheardastrangesound.T

[img]2018m9s/ct_etoefz_etoeflistz_201808_0014[/img][br]Whatisthelecturemai

Wehavecompiledalistofthingsthatexpectantcouplesandnewparentscan

土的含水量的定义，正确的是（ ）。A.单位体积土的总质量中所含水的质量的比例

活髓牙钉洞同位型要求钉洞的深度一般为A.1mm B.0．5mm C.1．5m

患者，男，35岁。肛旁肿痛3天，持续加剧，伴有恶寒、发热、便秘、溲赤，肛周红肿，

中央银行窗口指导的主要特征是()。 A.限制存款增加额B.限制贷款增减额

下列选项中，属于施工方进度控制技术措施的是（） A.编制资源需求计划B.

土的含水量的定义，正确的是（　　）。A.单位体积土的总质量中所含水的质量的比例