Rearrange tiles on the board to represent equivalent expressions. Which expressions are equivalent to 6+(-x) + 2x + (-7) + 2x? Check all that apply

Find the value of the variable and the length of each secant segment.

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

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction