What is the slope of a line parallel to line b?

-1/3

2/5

5/2

5/3

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?