Match the equivalent expressions.
7x4−5x4

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

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