What is the value of tan(π6)

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Is the square root of 4 plus the square root of 16 rational?

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price