Which one of the following statements expresses a true proportion?

a.) 42 : 7 = 6 : 2

b.) 14 : 6 = 28 : 18

c.) 2 : 3 = 3 : 2

d.) 3 : 5 = 12 : 20

What is the quotient of -3/8and-1/3?

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)

Angle mno is s rotated 180 degrees counterclockwise about the origin to form angle m’n’o’. which statement shows the measure of angle m’n’o’?