If y=x+2 changed to y=x-1 how would it change

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

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