Suppose that a product can be sold at split-off for $5,000 or processed further at a cost of $1,000 and then sold for $6,400. Should the product be processed further?

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If 3x+8=3x+8 is it one solution or no solution

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