I'm sorry you weren't happy with my first reply to these problems. However, it's good that you're getting closer to posting one question per thread, which is the general etiquette around here.

I had written

Since you seem to be struggling, here is what problem #1 comes out to:

So

For problem #5, here's a diagram (not to scale)

where T = Teen Choice and C = Cool Teen.

Using informal notation, we may write

(T) + (T and C) = 0.38

(C) + (T and C) = 0.47

1 - (T) - (C) - (T and C) = 0.35

If you're comfortable with solving systems of equations, this will be pretty easy, we can rewrite

x + y = 0.38

z + y = 0.47

1 - x - y - z = 0.35

If you're not comfortable with that, no problem. Notice that

1 - x - y - z = 0.35

is the same as

1 - (x + y + z) = 0.35

We can substitute the value for x + y as follows:

1 - (0.38 + z) = 0.35

Is this making sense to you? If not, feel free to ask questions, or maybe someone else will write up a simpler explanation.