Complete the process of solving the equation. Fill in the missing term on each line. Simplify any fractions.
2b + 13 - 9 = 12
2b +
= 12 (Combine like terms)
2b =
(Subtract 4 from both sides)
b =
(Divide both sides by 2)

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

Name these type of angles shown check all that applies

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0