If m < 2 = 40o then what does m < z equal

Angle x = 180 - (90 + 40) = 50
angle z = 180 - (90+50) = 40

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.