If mA = mzB and mzA + m2C = m2D, then m2B + m2C = m2D

Which property is shown?
A. Reflexive property
B. Substitution property
C. Symmetric property
D. Transitive property

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.

step-by-step explanation:

rectangles are made up of 4 right angles, which means that a side and a base meet perpendicular to one another.   their slopes then have to reflect perpendicular slopes.   perpendicular slopes are opposite reciprocals of one another.   for example, if the slope of one line is +2/3, then the perpendicular slope to that would be -3/2.   so we look for that combination in our choices.

all of them satisfy that condition (so what's the question, i guess? )