The first equation in a system is 5x + 2y = –4. Which equation gives a system with no solution?
A. y = 2x + 6
B. y = 14x – 2
C. y = 2x + 7
D. y = –52x – 3

y = 14x – 2

explanation:

just replace the y in the original equation with that value of y in B.

answer: i believe c. is the answer sorry if i am wrong

step-by-step explanation:

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