the vertices of triangle ABC are A(2,3), B(-1,2), and C(3,1). If DEF~ABC and DE = 4AB, what is the length of EF?

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.

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?

Which ordered pair is a solution of the equation? 2x+3y=10