Compared to last year the population of boom town has increased by 25% the population is now 6,600 what is the new population

Multiplying an even number of negative numbers gives an answer that is choose from:

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

Can someone check if i did this correct. it’s number 4 if you’re wondering.