Which of the following is the quadratic formula

Write a real-world solution that can be represented by the equation y = 7x be sure to explain what the variables represented in the solution

Cynthia takes her dog to the park every 2 days. she bathes her dog every 7 days. if she took her dog to the park and bathed him today, how long will it be until she does both on the same day again?

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?