Adiagonal cross section of a sphere produces which two-dimensional shape?

Which linear equations have an infinite number of solutions? check all that apply.  (x  –  3/7)  =  2/7(3/2x  –  9/14)8(x  +  2)  =  5x  –  1412.3x  –  18  =  3(–6  +  4.1x)(6x  +  10)  =  7(x  –  2)4.2x  –  3.5  =  2.1 (5x  +  8)

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

What is the gcf of 20c^3-5c^4+30c^6