如果多项式A减去-3x+5，再加上x2-x-7后得5x2-3x-1，则A为____爱下问搜题

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问题解答题

如果多项式A减去-3x+5，再加上x²-x-7后得5x²-3x-1，则A为______．

答案

根据题意得：

A=（5x²-3x-1）-（x²-x-7）+（-3x+5）=4x²-5x+11．

故答案为：4x²-5x+11．

选择题

If it ____tomorrow, I’d go downtown with my brother.

A．isn’t raining

B．doesn’t rain

C．weren’t raining

D．has rained

单项选择题

District	Number Of Votes	Percent of Votes for Candidate P	Percent of Votes for Candidate
1	800	60	40
2	1,000	50	50
3	1,500	50	50
4	1,800	40	60
S	1,200	30	70

The table above shows the results of a recent school board election in which the candidate with the higher total number of votes from the five districts was declared the winner. Which district had the greatest number of votes for the winner

A．1

B．2

C．3

D．4

E．(E) 5