Please help!! Ive been trying to pass this test and i cant i need some help pleass!

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

Use sigma notation to represent the following series for 9 terms.