Determine whether the sequence is arithmetic. If the sequence is arithmetic, determine the first term a and common difference d.5, -15, 45, -135, 405, . . .

A. Arithmetic; a = 5, d = -10
B. Not arithmetic


Answer: B

Mathematics

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Evaluate the algebraic expression for the given value or values of the variable(s).2(x + 1) + 21;x = -4

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