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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?
Suppose \(a, b, c, d, ...\) is an arithmetic progression with \(b = 8.\) What is the average (arithmetic mean) of \(a, b,\) and \(c?\)
If this sequence is an arithmetic progression, what is the value of \(c?\)