One question a friend out you guys : -)

Write a corresponding real world problem to represent 2x - 125=400

Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?

Swimming fleury swam 6 laps the first day,15 laps the second day,24 laps the third day, and so on.on which day will fleury swim 51 laps if the pattern continues?