Mathias and Roman are discussing how to simplify the following expression: 7ba? + 90° - 9(143b + 2ab?). They are writing an equivalent expression before and after combining like terms. Select all the possible solutions they obtained in the process.

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?

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.