Which of the following lists of ordered pairs is a function? a.(2, 4), (3, 9), (4, 16), (5, 25) b.(0, 2), (4, 2), (0, –4), (4, –2) c.(1, 1), (2, 3), (1, 5), (4, 7) d.(2, 4), (–2, 4), (3, 9), (–2, –4)

A, is the answer because each input has one and only one output

You have to give us options

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!