(2 marks) Ten persons will stand in a line. 3 males and 7 females. In how many ways they may be arranged according to gender?​

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

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?