What will I get for this 16 + x = 12

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?

Which graph represents the equation y =4x

Find the domain and range of the following function f(x) = 51x - 21+ 4