−10(9c−7c+8)−8c
pls help

Working on itts i’m going to need you to me as i go along 1-5

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.

What properties allow transformation to be used as a problem solving tool