Answer:
A. 15
Step-by-step explanation:
We are given a right angles triangle with hypotenuse length (c) = 23.5 and ∠B = 51°.
Now, using the trigonometric forms of a right angled triangle, we get,

i.e. 
i.e. 
i.e. 
i.e. 
So, the value of a = 14.8.
Hence, the nearest whole number to 14.8 is 15 i.e. a = 15.
B is the answer if it is x + 9=20
When we try to solve for f(-2), we are trying to find the range of the point that has a domain of -2. On the graph, when x equals -2, f(x) equals 2. The blank is 2.