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
18
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/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
(1)InthecaseofArchimedes,althoughhemademanywonderfuldiscoveriesof
Intit-for-tatexpulsions,IndiaandPakistan[br][originaltext]Indiaand
[originaltext]Anewstudyhasfoundapositivecorrelationbetweenhowmuch
行车中当机动车突然爆胎时,驾驶人切忌慌乱中急踩制动踏板,应尽量采用抢挂低速挡的方
右边四个图形中,只有一个是由左边的四个图形拼合(只能通过上、下、左、右平移)而成
根据下列统计资料回答问题。 以下关于当年部分城市空气质量的描述,与
湿热或痰热内蕴,湿热上泛时的舌象表现是A.老舌 B.嫩舌 C.红胖舌 D.
A.胃溃疡 B.慢性肾炎 C.中毒性肝炎 D.急性胰腺炎 E.急性心肌梗
邻近营业线施工分为A、B、C三类,下列作业属于C类施工的是()。A.吊装作业时侵
患者女,45岁。间歇性发作咽下困难3个月,伴反酸、烧心,可因情绪波动诱发。食管造
最新回复
(
0
)