Why is 8x-16 equivalent to 2(4x+8)

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

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

Find the area between y=e^x and y=e^2x over [0,1]