Need id really appreciate it simplify 2x + x.

X-10/4 when x = –18 a 7 b –2 c –7 d 2

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8

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