The sales tax in one twin is 8%. so, the total cost of an item can be written as c + 0.08c. what is the total cost of an item that sells for $12?

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?

Which two undefined geometric terms always describe figures with no beginning or end?

Find the measure of angle c in the following triangle.