Is 21q-7p equal to (3q-p)(7)

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 slope of the line shown below?

What describes horizontal cross section of the right rectangle 6m 8m 5m