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
2024-01-12
32
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:https://tihaiku.com/zcyy/3355428.html
相关试题推荐
Tamipurchasedseveralidenticallypricedmetalframesandseveralidenticallyp
AtaxidriverpurchasedfourtiresoftheToughgripbrandforhiscab.Withinsi
Thepricethegovernmentpaysforstandardweaponspurchasedfrommilitarycontr
Onestateaddsa7percentsalestaxtothepriceofmostproductspurchasedwit
Ifacertaincompanypurchaseditscomputerterminalsforatotalof$540,400an
Tomhad6books.Hegave2tohissisterandthenpurchased3morebooksatthe
Atafruitstand,applescanbepurchasedfor$0.15eachandpearsfor$0.20eac
Thereareatotalof21applesandavocadosatabasket.Iftheratioofthenum
Althoughhehadbeenmanytimesgiventhecaveatemptor,Feldmanpurchasedpaint
ShorelandCountyrecentlypurchasedanareaofwildernesslandinthecounty
随机试题
Yearsofexperienceinthestockexchangemarkethasmadehiman______stockcons
What’sthemaintopicofthepassage?[br][originaltext]We’rehearingitm
Oursocietyvaluesboysandtheirexperiencemorethanitvaluesgirls,and
[originaltext]Samhadworked30yearsforthesamecompanyandnowhehadt
[originaltext]Helloeverybody,andWelcomebacktothethrillinggameatthe
对于无产阶级革命来说,促使革命主观条件成熟的关键是()A.人民群众觉悟程度的提高
男性,1岁,体外循环下行室缺修补术。体外循环下血液复温,变温器水和血流温差应该小
临床血清同工酶电泳多采用A.双向电泳 B.琼脂糖凝胶电泳 C.毛细管电泳
某医疗机构自制制剂复方止咳合剂的批准文号有效期将满,需要继续配制,申请人应该在有
预算收入按来源划分为( )。A.税收收入 B.行政事业性收费收入 C.国有
最新回复
(
0
)