Abox contains
5
plain pencils and
5
pens. a second box contains
7
color pencils and
3
crayons. one item from each box is chosen at random. what is the probability that a pen from the first box and a crayon from the second box are selected?
write your answer as a fraction in simplest form.

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.