Which property would justify the following statement? If x+2= y and y = 20, then x+2=20.

Sum of the interior angles of a pentagon

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.