6friends earned $645 for painting some rooms and a neighbor's houseif they divide the money equally how much money will each friend get

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 measure of angle 0 is 600 degrees

Ratio of circumference to diameter example plz i need to now what it looks like.