A triangle is rotated 90° about the origin. Which rule describes the transformation? O(x, y) (-X, -y)
O(x, y) → (-y, x)
O (x, y) - (-y, -x)
(x, y) - (y, -x)

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?