Its timed
the axis of the symmetry for the function f(x)= -x^2-10x+16 is x=-5. what are the coordinates of the vertex of the graph
a. (-5, 41)
b. (-5, 56)
c. (-5, 76)
d. (-5, 91)

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

5

10

15

20

25

30

35

40

45

50

55

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.