All of the central angles (non-overlapping) of a circle sum to 360
"Vertical angles are the angles that are opposite each other when two straight lines intersect. (Technically, these two lines need to be on the same plane) Vertical angles are congruent (in other words they have the same angle measuremnt or size"
supplementary angles sum to 180 Clomplementary angles sum to 90
6a^2 + 5a + 4 = 3,
6a^2 +5a +1 = 0 Now use Quadratic Formula to find the two values of a ....use the smaller one to calculate 2a + 1
5^x-3^y=3 Multiply this equation by -4 add it to the first equation ...and see what you get !
6 - 2i + 2i + i^2 = ???? (remember i^2 = - 1)