What percentage of $15 is 75 cent​

1. what are the missing reasons in the proof 2. it's in the second picture and 3

How many solutions does the nonlinear system of equations graphed bellow have?

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%