Using the matrices below, perform the following operation:
x= [1 2]. y= [12 5]
[7 8]. [3 1]
2X + Y = ?

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10