Given the equation: -8 + x = -10 and the solution x = -2. What step did we take to solve this equation?
Add 8 to both sides
Add -8 to both sides
Subtract 8 from both sides
What is the value of x in the equation 3x = 18 (just type in the number)

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.