Ralph sold brownies for $0.18 a piece in order to earn money to buy baseball cards. if the cards cost $0.90 per pack, and if ralph had no money left over after buying them, what is the least number of brownies he must have sold?

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