The table below shows some inputs and outputs of the invertible function f with domain all real
numbers.
T
9
- 11
7
11
-6
-13
11
4
-6
-1
-15
-5
Find the following values:
f-1(-15) =
f-1(4) + f(9) =

C. (2x + 16) + (x) = 180°

Step-by-step explanation:

See attachment for the cyclic quadrilateral

One theorem of cyclic quadrilateral states that; opposite angles = 180°

In the attachment, the angle opposite B is D

Where B = x

D = 2x + 16

From the theorem stated above;

B + D = 180°

Substitute the values of B and D in the formula above

x + 2x + 16 = 180

From the list of given options, the correct answer is C