How can you solve this answer a school cafeteria makes cheese sauce for macaroni using 15 cups of swiss cheese and 17 cups of cheddar cheese perry tries to make the sauce for a family party using 5 cups of swiss and 7 cups of cheddar ,is perry using the correct ratio? explain.

i need !

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

How does the graph of y = 3x compare to the graph of y = 3-x?

Im so bad at fractions they are not my best math thing to work on