Which idea was originated by a Muslim scholar during the Islamic Golden Age?

Soon-yi's house has a hexagonal window made up of six identical equilateral triangles as pictured below.

The function y= -x-3 is graphed only over the domain of {x|8 a: {|-5 b: {y|1 c: {y|1 d: {y|1

Viktor is a russian university student. he wants to go to new york for a semester to study and improve his english. what should he do before he buys his plane ticket? a. buy a map of new york city b. pay for his program in new york c. apply for a us visa d. apply for a policy waiver