Use a graphing calculator or spreadsheet software to solve 4x + y + z = 1 8x – 4y – 7z = 2 5y + 9z = 3 using matrices.

Mary spent a total of $323.14 for a party. she spent a total of $200.22 on food, plus an additional $30.73 for each hour of the party. how long was the party?

Easy points boii. read it. ya. fresh

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