What is the common difference of the arithmetic sequence on which the series is based?
-3
4
6
9

Germaine walks at the rate of 10 feet every five seconds while nolan walks at the rate of 15 feet every five seconds. if germaine has a head start of 25 feet, how many seconds will they be at the same spot?

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

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?