Which sentence explian why the slope of AB is equal to the slope BC ?

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

What is the value for this expression? 2e-5

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations