Given sin x= 0.5, what is cos x?
enter your answer as a decimal, round only your final answer to the nearest hundredth.

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?