9.1.4 Review & Preview

While Katarina was practicing her figure skating, she wondered how far she had traveled. She was skating a “figure 8,” which means she starts between two circles and then travels on the boundary of each circle, completing the shape of a sideways 8. If both circles have a radius of 5 feet, how far does she travel when skating one “figure 8”?  Homework Help ✎

The graph of the inequality y>2x−3 is shown below. On graph paper, graph the inequality y≤2x−3. Explain what you changed about the graph.  Homework Help ✎

An international charity builds homes for disaster victims. Often the materials are donated. The charity recently built 45 homes. 20% used granite for the kitchen countertops, while the rest used porcelain tile. 15 of the homes used red oak for the wooden kitchen floor, 20 used white oak, and 10 used maple. If a disaster victim is randomly assigned to a home, what is the probability (in percent) of getting an oak floor with granite countertops?  Homework Help ✎

Multiple Choice: The point A(−2,5) is rotated 90°counter-clockwise (↺) about the origin. What are the new coordinates of point A? 9-52 HW eTool (Desmos)  Homework Help ✎