Can someone please help me with all 5 of these questions? You don't have to answer all 5 but I would appreciate it if you answered some. I will give brainliest and 20 points to whoever does help me with these questions.

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Robert has 78 tomato lants and 56 cucumber plants .he wants to plant them in rows that only have one type of plant in each row with the same number of plants in each row. how many plants should he put in each row and how many rows of each type of plant will he need

Atown recently dismissed 5 employees in order to meet their new budget reductions. the town had 5 employees over 50 years of age and 19 under 50. if the dismissed employees were selected at random, what is the probability that exactly 2 employees were over 50? express your answer as a fraction or a decimal number rounded to four decimal places.