Which equation is the inverse of y=9x^2-4

Which letters from the table represent like terms? a and b b and c a and d b and d

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.

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2