Which equation is correct regarding the measure of _1?
O m21 = {(a-c)
O m21 = {(a + c)
m_1 = {(0-0)
O m1 = {(b + c)

answer: the correct one is a

step-by-step explanation:

(-5,-28)

i graphed to on desmos.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

answer: what is the question you're trying to ask?

step-by-step explanation: