首页
登录
职称英语
At a fruit stand, apples can be purchased for $0.15 each and pears for $0.20 eac
At a fruit stand, apples can be purchased for $0.15 each and pears for $0.20 eac
游客
2025-02-23
38
管理
问题
At a fruit stand, apples can be purchased for $0.15 each and pears for $0.20 each. At these rates, a bag of apples and pears was purchased for $3.80. If the bag contained 21 pieces of fruit, how many of the pieces were pears?
选项
答案
13
解析
If a represents the number of apples purchased and p represents the number of pears purchased, the information can be translated into the following system of equations.
0.15a+ 0.20p = 3.80(total cost)
a+p = 21(total number of fruit)
From the second equation, a = 21-p. Substituting 21-p into the first equation for a gives
0.15(21-p)+ 0.20p = 3.80
(0.15)(21)- 0.15p + 0.20p = 3.80
3.15-0.15p + 0.20p = 3.80
0.05p = 0.65
p=13
Thus, of the 21 pieces of fruit, 13 were pears.
转载请注明原文地址:http://tihaiku.com/zcyy/3969990.html
相关试题推荐
Tamipurchasedseveralidenticallypricedmetalframesandseveralidenticallyp
Patriciapurchasedxmetersoffencing.Sheoriginallyintendedtouseallofth
Acertainbrandofhousepaintmustbepurchasedeitherinquartsat$12eachor
Thepricethegovernmentpaysforstandardweaponspurchasedfrommilitarycontr
Howmanyoftheinventoriedtextbookswerepurchasedbythetwoschoolscombined
Howmanyoftheinventoriedtextbookswerepurchasedbythetwoschoolscombined
Ifacertaincompanypurchaseditscomputerterminalsforatotalof$540,400an
Tomhad6books.Hegave2tohissisterandthenpurchased3morebooksatthe
Atafruitstand,applescanbepurchasedfor$0.15eachandpearsfor$0.20eac
ShorelandCountyrecentlypurchasedanareaofwildernesslandinthecounty
随机试题
DevelopinganAdvertisingCampaignGenerallyspeaking,f
[originaltext]Wouldyouliketohaveacupofcoffee?[/originaltext][originalt
SchoolsacrossChinaareracingtoimplementtheEducationMinistry’sdecre
Formostpeople,keepingfitinvolvesanestablishedexerciseroutinebuilta
赵某是山窝村村民,由于妻子生病,无奈之下将村里分给的宅基地出卖给他人。如果赵某想
甲诉乙称其侵占房屋。人民法院受理后,丙认为该房屋应属于自己所有并参加诉讼,人民法
图示电路中,N为含源线性电阻网络,其端口伏安特性曲线如图b)所示,其戴维南等效电
作为消防安全重点单位的某施工单位,建立了消防安全自我评估机制,定期对本单位进行一
某妇女52岁,绝经3年,要求防治骨质疏松,以下哪项不适用A.多饮牛奶 B.多吃
分部工程中有关安全、节能、环境保护和主要使用功能的()检验结果应符合相应规定A
最新回复
(
0
)