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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 suare root of 9x plus 7 plus the square rot of 2x equall to 7

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex