Achild's toy train collection contains 5 engines, 5 red cars, 7 blue cars, and 2 cabooses. what is the probability of randomly selecting pieces to make a three-part train of engine, red car, caboose?

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.