Answer:
12.6
Step-by-step explanation:
They are similar, so their lengths are the same. Except that The second one is bigger, therefore, you need to find the scale in which it is bigger.
7.2 ÷ 4 = 1.8 (line RS ÷ line LM because they are the correlating sides)
3.6 ÷ 2 = 1.8 (line RQ ÷ line LK because they are the correlating sides)
5.4 ÷ 3 = 1.8 (line SP ÷ line MJ because they are the correlating sides)
This tells us the scale is 1.8. So you just multiply 7 by 1.8 to get 12.6
This can be represented as: y = 1.8
7y = x
7(1.8) = x
12.6 = x
I hope this helped :)