Which of the following lists of ordered pairs is a function? (-1, 2), (2, 3), (3, 1), (2, 5)

(1, 2), (4, 0), (3, 5), (4, 3)

(2, 5), (3, 6), (6, 9)

(2, 5), (3, 6), (2, 1)

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

What is the perimeter of a rectangle if the length is 5 and the width is x?

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