Ayúdenme es urgente 1. Escribe una expresión lineal con variable x, que valga 1 cuando x = 1 y valga 7 cuando x = 3. 2. Escribe una expresión lineal con variable x, que valga −1 cuando x = −1 y valga −5 cuando x = 0.

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.