What is the value of y in the solution of the system of equations? 2x + y + z = 1
2x – y – 3z = –3

x – 2y – 4z = –2

a 5

b -10

c -8

Of four points are collinear, they are also coplanar

Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?

Arectangle has a length of 6cm by 8cm what is the length of a diagonal of the rectangle