Combine the like terms 7a-7b+4a-2/5b. plzz i will give you 100 points

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

Identify the number 127 as a rational or irrational. explain

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.