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
7
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
ThebasiccomponentsofasentenceincludeA、anounandaverb.B、asubjectanda
某生产线生产白糖,设白糖重量X~N(μ,15^2),现从生产线上任取10袋,s=
以下哪种建筑陶瓷不适用于室外?()A.陶瓷锦砖 B.陶瓷面砖 C.釉面瓷
依据变电检修管理规定,检修班组班长岗位职责明确规定规定班组长参与本班生产计划编制
方药配伍寓有“以补为固”之意的是( )。A.凉膈散 B.玉屏风散 C.泻白
下列关于原发性醛固酮增多症的说法,不正确的是( )。A.原发性醛固酮增多症属于
下列不属于甲亢的常见典型表现的是A.黏液性水肿 B.甲状腺弥漫性肿大 C.眼
具有强制性、无偿性和固定性特征的财政收入形式是( )。A.政府债券 B.税收
人类IgG开始合成的时间是A.胚胎15周 B.新生儿期 C.出生后3个月
依据《安全生产法》的规定,下列关于各级人民政府安全生产职责的说法,正确的是()
最新回复
(
0
)