If a/b=c/d then a+b/c+d=

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 to know the answer to this algebra question.

What is the x-intercept and y-intercept of the equation 2x+1. 2o