Fill in the blanks between the numbers with correct math symbols 5_6_15_9=24

Which value is not a solution of 8x^3 – 1 = 0

Will gve pints stars and brainliest

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