Which system of inequalities represents the graph? ⎧⎩⎨⎪⎪3x+5y≤10−x+y>−5y−6>−5x ⎧⎩⎨⎪⎪5y−10≤−3xy+5 xy+5x>6 ⎧⎩⎨⎪⎪3x+5y≥10−x+y<−5y−6<−5x

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