what are the first 30 digits of pi? im trying to learn and i already know some, i just want to know more.

Match the equivalent expressions. x - 3y + 12 12 - 3y - 2x + x + 2x 3x + 2y - 2x + y + 12 3y + 12 3x + y - 12 4y + 3y + 3x - 6y - 10 - 2 x + 3y + 2x - 3x + 7 + 5 x + 3y + 12 5 + 2y + 7x - 4x + 3y - 17

The sum of two numbers is 12 and their difference is 18 what are the two numbers

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