Noah has a total of 50 video games. He only buys action games and sports games. He has 20 more action games than sports games. How many action games and how many sports games does he have? Use substitution to solve this system of equations.

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.