Sarah had 3 cookies in her jar her friend angela took -18 from her jar how many cookies does she have now?

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.

Witch represents the inverse of the function f(x)=1/4x-12

What is the total surface area of this square pyramid?