Help me pleaseee , it’s 70 points

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?