Linda buys an item for $8.22. She gives the cashier a $50 bill. How much money should Linda get back?

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

Which diagram shows lines that must be parallel lines cut by transversal?

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle