Find the three arithmetic means in this sequence 14 and 26

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

X2 + y 2 = 36 x + y = 6 solve the system of equations.

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length