Reflect the point (5.7) across the line y=x. What is point new point?

Twenty-five percent of the customers entering a grocery store between 5 p. m. and 7 p. m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

The table above shows approximate conversions from gallons to liters. what is the value of x?

How do you solve a question like this?