What’s the slope Y=Mx+b

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?

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