If x is equal to the sum of the even integers from 40 to 60, inclusive, and y is the number of even integers from 40 to 60, inclusive, what is the value of x + y ?
550
551
560
561
572
登录 或 注册 后可以参加讨论
扫描二维码，直接登录
我也是。。
我也是..
+10086登录 或 注册 后可以参加讨论