15. 21
16. 38
17. 3072
18. 1
19. 44 (not 100% sure)
20. 11/13
21. 11/12
22. 36
118 belongs in a. rational numbers
The axis of symmetry is -b/2a so -(-8)/2(2) = 8/4 which is 2. The axis of symmetry is 2.
As you can see clearly the first equation and the second equation descripe the same line so the have infinite soultions that is why it is a coincident system
To find the correct order of similarity we see and compare the sides of both the trapeziums
LM corresponds to QR
KL to PQ
NM to SR
So the correct order should be
KLMN-PQRS
So first Option is correct
