Seven over seventy two times 360​

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )