Achessboard has 64 squares. at a chess tournament 84 chessboards were used. how many squares are there on 84 chessboards

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

The first side of a triangle measures 5 in less than the second side, the third side is 3 in more than the first side, and the perimeter is 17 in. how long is the third side? if s represents the length of the second side, which of the following represents the length of the third side? s-5 ws-2 s+ 3 next question ask for turn it in

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is