If x2 + mx + m is a perfect-square trinomial, which equation must be true? x2 + mx + m = (x – 1)2 x2 + mx + m = (x + 1)2 x2 + mx + m = (x + 2)2 x2 + mx + m = (x + 4)2

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

25 ! what is the value of x? enter your answer in the box. x =