Which point lies on the graph of the finite sequence shown? 5, –1, 6, 0, 7, 1, 8

(–1, 2)
(0, 5)
(5, 1)
(6, 1)
the answer is D (6,1)

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

What is the simplified form of square root of 400 to the 100th power ?