I had to redue this test plz help I need a 60 or up I’ll give brainliest

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.

Which best explains why this triangle is or is not a right triangle?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)