PL HELP FAST Joelle would like to tip her hairdresser 20%. If her haircut costs $38.00, which expression should she use to find the tip amount? (0.02) (38)
(0.2) (38)
(1.2) (38)
(20) (38)

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

Given a = {(1, , 5)(6,4)}, b = {(2,0)(4, ,5)(0, 0)) and c = {(1, 1)(0, 2)(0, 3)(0, ,5)}, answer the following multiple choice question: from the list of sets a, b, and c, state the domain of set b. domain of set b: {0, 6,5} domain of set b: {2, 4,-4, 0} set b does not have a domain