Determine the domain and range of the relation. {(10,19), (-1,-17), (15, -2), (13,9)}

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Ineed i been stuck on this question since yesterday

Which expression converts 45 degree to radians