We have a + b = 180 and a = 12 + b;
Then, 12 + b + b = 180;
12 + 2b = 180;
2b = 168;
b = 84;
a = 12 + 84;
a = 96;
Given the following functions below,

Factorising the denominators of both functions,
Factorising the denominator of f(x),

Factorising the denominator of g(x),

Multiplying both functions,
Answer:
There is no mode
Step-by-step explanation:
-4 because it is closer to the 0
If I'm correct and the ^ stands for multiplication then the answer should be 5.
The picture is my work just ignore the fraction.