No.1
In a Quiz competition, there are 20 questions. 5 marks are awarded for a correct answer and 2 marks are deducted for a wrong answer or no response. If the "Smart Team" scores 51 marks at the end of the competition, how many correct answers does the team get?
(Please use Algebra)
Algebra Math!!Plzzzz helpppp
2012-09-30 6:33 pm
回答 (3)
2012-09-30 6:45 pm
✔ 最佳答案
Let no. of correct answer = xso no. of wrong answer or no response = 20 - x
So score = 5x - 2(20 - x) which is equal to 51
5x - 2(20 - x) = 51
5x - 40 + 2x = 51
7x = 91
x = 13
2012-10-02 12:05 am
because that was a wrong question lo-.-just see it clearly before u have any comments stupid jerk.
2012-10-01 10:05 am
Why you delete the question you asking before ?? I have already given the ans. of answering 20 question. The ans. also is 13.
2012-10-01 02:08:28 補充：
you just a stupid guys.
2012-10-01 02:08:28 補充：
you just a stupid guys.
收錄日期: 2021-04-25 22:39:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120930000051KK00117