Triangle ABC is congruent to Triangle DEF with AB = 2x+6, and DE = 5x-12. What is the length of DE?

Step-by-step explanation:

ΔABC ≅ ΔDEF

So, DE = AB

5x - 12 = 2x + 6

5x = 2x + 6 +12

5x = 2x +18

5x - 2x = 18

3x = 18

x = 18/3

x = 6

DE = 5x - 12 = 5*6 - 12

  = 30 - 12

DE = 18

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.