A: b + 9
Step-by-step explanation:
If it's the sum of two numbers it is addition, meaning that you add the number of blue bikes(b) to the number of red bikes(9).
The first one is the same result for the division of all corresponding sides.
I’m not sure about the other one.
C because 2,400 divided by 450 is a little more than 5 and 5 times 12 is 60 and a little more than 60 is 64.
The answer is 4140
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