Algebra
# Arithmetic Progressions

If \(9, b, c, 18 \) is an arithmetic progression, what is the value of \(c?\)

True or false?

If \((A, B, C, D,...)\) and \((a, b, c, d,...)\) are both arithmetic progressions, then \((A-a, B-b, C-c, D-d, ...)\) is **guaranteed** to also be an arithmetic progression.

Jaspreet had $5 in her account on Day 1.

On each subsequent day after Day 1, she deposited a constant amount into her account.

At the end of Day 101, she has $305.

How many dollars did she have in her account at the end of Day 3?

\[5,9,a,b,c,...\]

If this sequence is an arithmetic progression, what is the value of \(c?\)

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