Audrey deposits $27 in her account. Then she makes two withdrawals, one for $15 and one
for $12. What is the total change to the balance
of Audrey’s account? Explain.

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?