Ms. Yost has 20 boxes of markers. She buys 420% more boxes. How many boxes will she have in all?

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.

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

What is the slope of the line that contains the points (-5, 6) and (14. - 7)?