I need help with the answer

How do i do this using elimination 2x+3y=12 x-y=6

Parallelogram efgh is a rectangle. he = 6, and fe = 8. find ge: and find fj:

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.