(NEED HELP ASAP) a = -9 b = -4

1.) 3ab

2.)4b^2|3b - 7

| is divide
I need it evaluated to a single value

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?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error