Simplify the expression.
(3-i) - (2 +6i)
1-7i
-1 + 7i
-6i
5+5i

The perimeter of △cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.

Figure abcd is a trapezoid with point a (0, -4). what rule would rotate the figure 270° clockwise, and what coordinate would be the output for point a'?

Erin writes the set of ordered pairs below. the set represents a function. {(3, –3), (5, 0), (–1, 4), (–6, 7)} erin claims that she can add any point to the set and have the set still represent a function. which of the following points can be used to show that erin's claim is incorrect? select three that apply. (–6, 1) (–1, 9) (0, 5) (1, 7) (3, –2)