Express 84 as a product of its prime factors

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.

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

What is the slope of the line shown below?