Why does math have to be so hard?

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)

I'm a polygon i have no parallel lines i am formed 3 line segments i have one right angle two of my angles are angles what am i