What is the rule used to transform ABC to its image

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Find two numbers if their sum is 91 and the ratio is 6: 7?

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