CalculatorUser

The answer to 1. is:

F: All of the below.

The answer to 2. is:
 

C: Contrapositive

where did you get the 90?

um the question is missing vital information!

You are lucky I use AoPS and was able to render your image :/

Angle DCB + Angle DAB = 180

Lets call ACD \(x\)

and lets call CAB \(y\)

\(x+y+70=180\)

Now.

Can you figure out the answer? (simple algebra!)

I think you mis-typed 2/7 as 27

I remember that website from AOPS

I think you forgot something in the second "suppose" statement.

I don't understand question B, it either may be my brain or it may be numerous typos in the problem

Hint: Think of TEA as one unique letter