Well you can just keep adding 55 =1hr until you get to 400 the same with 45
9 of the dogs at the shelter are puppies.
For this question you can say:
10/2 = a/a-9 is equal to 2a = 10a - 90
so now you should add -10a on both sides:
2a -10a = -90 ⇒ -8a = -90 ⇒ a = -90/-8 ⇒ a = 11.25 :)))
i hope this is helpful
have a nice day
Answer:
i think 17
Step-by-step explanation: