There were 350 students competing at the regional spelling bee. during the first round 20% of the contestants were eliminated. how many contestants were still in the competition at the beginning of the second round?

Use the distance formula to find the distance between (-3,5) and (3,1)

Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.