What contribution did al-khwarizmi make to the world of mathematics?
a. he developed the formula and process used to make persian rugs.
b. his work became the basis for algebra.
c. he created the number system based on chinese number system.
d. he determined the formula for finding the hypotenuse of a right triangle.

gaius cassius longinus and marcus junius brutus, former enemies of julius caesar who'd joined the roman senate, led caesar's assassination, dubbing themselves "the liberators." and the second one is   the assassination of julius caesar was the result of a conspiracy by many roman senators led by gaius cassius longinus, decimus junius brutus albinus, and marcus junius brutus. they stabbed caesar (23 times) to death in a location adjacent to the theatre of pompey on the ides of march 15 march 44 bc.