The value of cos B is 12/13
Answer:

Step-by-step explanation:
The given binomial expression is:

When we compare to:

We have


The nth term is given by;

To find the 3rd term, we put:

We substitute into the formula to get:

We simply:


The probability would be 50%
Answer:
x = 133
y = 43
Step-by-step explanation:
x + 47 = 180
so x is 133
47 + y = 90
so y is 43