If a= (0,0) and b = (2,5) what is the appropriate length of ab

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 with number 6 , explain how to get 1978

Write the pair of fractions as a pair of fractions with a common denominator