René Descartes was the person who created analytic geometry and the Cartesian coordinate system
Answer:
D) 140°
Step-by-step explanation:
The total number of degrees in a triangle is 180. Since both sides of the triangle are the radius of the circle, the triangle is isosceles. Therefore the two opposite angles are equal. Thus, the central angle is 180° − 2(20°) = 140°.
Answer: 7-7i
Step-by-step explanation:
u+v=
5-2i+2-5i=
5+2-2i-5i=7-7i
Answer:
(3,3)
Step-by-step explanation:
Use the midpoint formula to find your answer. The formula is 
.
If that equation looks funny then let me explain. You need to add 10 and -4 together, then divide it by 2. You also need to add -3 and -9, then divide that by 2.
