Solve the following systems.
8x -2y = -16
y = 8 + 4x
and
7x - y = 2
-7x + y = 2​

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 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

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?