Solve: 3x-5y= -15 using y=mx+b method. show steps

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

This is different from the first one can someone me

Define multiplicative inverse. give an example of a number and its multiplicative inverse.