Ed took his friends to a football game and bought nachos and hot dogs for everyone. Nachos are $3.00 and hot dogs are
$2.00. If he spent a total of $29 on the 12 items, how many hot dogs did you purchase?

What number produces an irrational number when multiplied by -1.25

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?

What situation is an example of an observational study