2) Customer number two gives you a 15% off coupon. What is the new cost
of the order?

$10.00

Translations move every point on a figure the same distance and direction. that way you can use the one vertex and its image to find the rule that maps the triangle to its image. this rule can then be used to find the images of the other vertices of the triangle. plot the vertices and connect them to form the image of the triangle.