At the beginning of the month, evan had $24 in his account at the school bookstore. use a variable to represent the unknown quantity in each transaction below and write an equation to represent it. The represent each transaction an a number line. What is the unknown quantity in each case

Idon't want to fail summer school. the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table. the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.