Divide the different of 47 and 23 by the different of 25 and 13​

Which expression gives the area of the triangle shown below

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?

How many 2/5s are in 1 and 1/2 plz someone me right now