Solve this linear system.
3x + 4y - z= -6
5x + 8y + 2z = 2
-x + y + z = 0

Will give brainliest summations with algebraic expressions image shown

The figure below shows rectangle abcd and the triangle eca on a coordinate plane. which of the following expressions represents the perimeter of triangle of triangle eca in units

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.