5x + y = 13
3(x + y) =12+ y
Solve the system of Equations

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan 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?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?