
PEMDAS states to do what's in the parenthesis first...

PEMDAS states to multiply 5 by 1 next...

PEMDAS states to subtract 4 by 5 next...

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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey
Answer:
- B. BC = 18 so ∆ABC ~ ∆DEF by SAS
Step-by-step explanation:

So, ∆ABC ~ ∆DEF by SAS.
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A cause she measured the side of it
A. For each year a person ages his or her maximum heart rate decreases by 220 beats per minute.!