How can you tell when a quadratic equation has two identical, rational solutions?

Pls! does anybody know a shortcut for answering these types of questions in the future?

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!