Please help (sorry abt the quality again)

Evaluate the following expression 1/3^2

Find the roots of the equation below. x^2 - 6 + 9 = 0

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?