Cecilia says she can use addition to solve multiplication problems. is cecilia correc? explain

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).