Help what is the correct answer for this question?

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

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

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.