3-6 12 4 20 ? what is the answer to this pattern

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.

Alogical argument that is presented in graphical form using boxes and arrows is called?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7