Triangle DEF is a scaled copy of triangle ABC. Which segment in the scaled copy corresponds to segment AB? I NEED HELP ASAP!

At least two people have the same birthday in a school of 150 students

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)