Can you guys tell me the answer to this question?

Complete the steps to find 4.830 ÷ 5

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?

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