Using the internet, open Wikipedia. what have you observe about it's interface?

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Determine whether the graphs of y=8x+5 and -y=8x-5 are parallel, perpendicular, coincident, or none of these. a. coincident b. parallel c. perpendicular d. none of these

The trigonometric ratios sine and secant are reciprocals of each other