Ineed the work for 6 and 8 if u will pls me out

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.

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Through non-collinear points there is exactly one plane.