Write the expression -5i(1 + 3i) as a complex number in standard form.

The area of the map is the product of the length and width. write and expression for the area as the product of the two binomials do not multiply

The graph of a curve that passes the vertical line test is a:

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