Answer:the harleyquin costume would cost 40 $
Step-by-step explanation: as given the batman costume costs 20$. so 20 times 2 equals 40$.
20*2= 40$
Answer:
2.5
Step-by-step explanation:
y=kx, k is constant of prop
Answer: x=2
Step-by-step explanation:
Answer:

Step-by-step explanation: