What are the coordinates of the point (2, -3) after a counterclockwise rotation of 90 about the origin

Solve the system of equations. y= 2x y= x^2 - 15

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.