Help?? I'll give points and brainlist! just answer the right question!

Achef will make pizzas. he has broccoli, peppers, onions, pepperoni, and sausage. how many types of vegetable and one type of meat?

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?