Question

What is the sum of x and y?

Answer 45
90
135
180

Answer 1

insufficient data.

Answer 2

is J a right angle?

well try:

\[\tan^{-1} (20/21)+\tan^{-1} (21/20)=x\]

Answer 3

the angles in a triangle will always equal 180...

if J is right, then the remaining two will be 90, you just won't know what they are individually