Answer:
the answer is -34x^-4 y^19
Step-by-step explanation:
i hope this helps
Present Day:
Bob:Rob:Difference
3 : 4 : 1
6 : 12 : 2
4 years ago:
5 : 7 : 2
59
ur welcome
b + (-a)
Good morning ☕️
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Look at the photo below for the answer.
:)