Answer:
If a, b and c are in arithmetic progression, that means that a + c = 2b. So a + b, a + c and b + c are also in arithmetic progression.
This might help.
Answer:
picture?
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The picture is upside down my dude, delete the question, re-upload it and ill help you out.
Answer:
You just typed the answer, it's units
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Answer:
20x
Step-by-step explanation:
