Question

SAT数学题求解

Vehicle A travels at X miles per hour for X hours. Vehicle B travels M miles per hour faster than Vehicle A, and travels N hours longer than Vehicle A. Vehicle B travels how much farther than Vehicle A, in Miles?

Answer 1

A车以X里/h的速度行驶了X小时，B车以(X+M)里/h的速度行驶了（X+N）小时，问B车比A车多走几里路？
(X+M)（X+N）-X²=(M+N)X+MN（里）

追问

you got it dud. thx a billions

you got it dud. thx a billions

追答

You are welcome! I thought you required an answer in English :)

Answer 2

A车在X小时内行车距离：X2 Miles
B车在（N+X）小时内行车距离：（M+X）*(X+N) Miles
所以B车在规定时间内比A车多行：
（M+X）*(X+N)-X2=M*N+(M+N)*X

Answer 3

(M+N)X+MN miles

追问

Please give me some details about how to solve this kinds of algebra questions

追答

Yea, sorry, just saw your reply here. I think the other guys already answered your question and we got the same answer.
If you have more SAT questions please let me know see if i can help.

Good luck