Question

英文数学题，请大家帮忙，谢谢！

Bill has scores of 95, 78 and 93 on his english exams , if he wants to get an A on his report card , he must have an average of at least 90 , what is the lowest score he can get on his next exam and still have an A?请大家写步骤！，谢谢！

Answer 1

【参考答案】

设第四次考试成绩为x分，则：
(95+78+93+x)/4≥90
95+78+93+x≥360
266+x≥360
x≥94
故 要想平均分达到90分以上进而最终得到A，他第四次考试至少要达到94分。

有不理解的地方欢迎追问。。。

Answer 2

平均分要超过90才能得A，那么总分要超过90×4=360 分
所以第四次考试的分数要超过：360-95-78-93=94 分
希望能帮助到你！望采纳！谢谢~~~

Answer 3

题目翻译：比尔英语考试分数为95,78,93，如果他想得A他必须达到平均分90以上，那下次考试他最低要考多少分才能保证反馈卡上得A
solution:the total score Bill has attained in the first three exames is (93+78+95=)266. If he want an average of 90, the total score in four exames altogether should be at least 360. Thus, in the fourth exam, Bill must get (360-266=)94 so that he can fulfill his plan.
题目不难，想不您要的是英文的解答步骤

Answer 4

94
90*4-95-78-93=94

Answer 5

360-(95+78+93)=94这样对么