3(x+y)
plz help plz if yk the answer

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?

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Jane has 5 nickels.john has 3 dimes.jane says she has a greater amount of money.with the information given,is she correct?