Step-by-step explanation:
Given

Also given

Lastly,

I would if i had paper:( its hard to explain
Answer:
It equals a negative number because there is a negative and a postive which will result in a negative answer.
P(2 aces) = (1/13)^2
P(2 kings) = (1/13)^2
P(king and ace) = 8C2/52C2 - 2(1/13)^2 = 0.0152
If you look up "angles of 7 sided polygon" it would give a result of how many degrees polygons with 7 sides such as this one above would equal to. It's important to know that when finding x angles within.
7-sided polygons = 900 degrees in total
Since all the other angles except x are given, we can add all those up and set it equal to 900. So it would look like this:

Simply solve for x now.

So x = 111 degrees.
Hope this helps!