Quadrilateral PQRS is inscribed in circle A. Which statement is necessarily true? A.
m∠R = m∠S
B.
m∠R + m∠S = 180°
C.
m∠R = m∠S
D.
m∠R + m∠S = m∠P + m∠Q

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.