Help me please! Did I do this right?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

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.