Write the expression with a positive exponent. Remember the "^" symbol represents raising to the power. 4^-2

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.

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Ihonestly have no clue if it's each or none.