Ryan is selling his collection of nike air jordans. he paid a total of $1720 for the 12 sneakers when they were new. when he goes to the second-hand store, they agree to give him a fixed amount of $175 for the sneakers plus 50% of what the sneakers were worth new.

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.