首页
登录
职称英语
Ellen has received the following scores on 3 exams: 82, 74, and 90. What score w
Ellen has received the following scores on 3 exams: 82, 74, and 90. What score w
游客
2025-02-23
22
管理
问题
Ellen has received the following scores on 3 exams: 82, 74, and 90. What score will Ellen need to receive on the next exam so that the average(arithmetic mean)score for the 4 exams will be 85?
选项
答案
94
解析
Let x represent the score on Ellens next exam. This initial step of assigning a variable to the quantity that is sought is an important beginning to solving the problem. Then in terms of x, the average of the 4 exams is
which is supposed to equal 85. Now simplify the expression and set it equal to 85:
Solving the resulting linear equation for x, you get
246 + x = 340
x = 94
Therefore, Ellen will need to attain a score of 94 on the next exam.
转载请注明原文地址:https://tihaiku.com/zcyy/3969986.html
相关试题推荐
Fortherectangularsolidbelow,findthefollowing.(a)Surfaceareaofthesoli
ThecirclewithcenterObelowhasradius4.Findthefollowing.(a)Circumferenc
InparallelogramABCDbelow,findthefollowing.(a)AreaofABCD(b)Perimeterof
Foreachofthefollowingfunctions,givethedomainandadescriptionofthegr
Inthecoordinatesystembelow,findthefollowing.(a)CoordinatesofpointQ(b
Findthefollowing.(a)40%of15(b)150%of48(c)0.6%of800(d)15is30%ofwh
Evaluatethefollowing.[img]2015m7x/ct_egreqj_egreqjs_0118_20151[/img][*]
Evaluatethefollowing.(a)15-(6-4)(-2)(b)(2-17)+5(c)(60+12)-(-7+4)(d)(3)4
Attheratesshowninthegraph,whichofthefollowingisclosesttothenumber
Questionsarebasedonthefollowingdata.[img]2022m10s/ct_ve01203002j_egreqtbz
随机试题
Thefact______(她迟到了几分钟)isnoreasonfordischargingher.thatshewasafewminu
"ConquestbyPatents"→Patentsareaformofintellectualpr
Thenthegreatdaycame______hewastomarchpastthepalaceintheparade.A、w
Forthispart,youareallowed30minutestowriteanessay.Supposeyouhavetw
以电子数据交换、电子邮件等方式表现所载内容,一律不视为书面形式。()
甲状舌管囊肿及瘘手术的治疗原则是:()A.切除囊肿及瘘,留置引流,促进愈合
下列有关开放式基金份额的转换、非交易过户的说法正确的是()。A.一般采取
建设单位应当将大型的人员密集场所和其他特殊建筑工程的消防设计文件报送公安机关消防
下列关于资产证券化的说法,正确的是()。 A.具有将缺乏流动性的贷款资产转化
2×19年1月1日甲公司支付价款1020万元(与公允价值相等)购入某公司同日发行
最新回复
(
0
)