Solve the problem.Find a polynomial for the sum of the areas of these circles.

A. ?r2 + 324?
B. ? + 388
C. (388 + ?)r2
D. ?r2 + 388?

Answer: D

Mathematics

Write an expression for the general or nth term, an, for the geometric sequence.1, -3, 9, -27, . . .

A. an = 1 ? (-3)n B. an = 1 ? (-3)n-1 C. an = -1 ? 3n D. an = 1 ? 3n-1

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Mathematics

Write out the sum.

A. 1 + 2 + 3 + ... + n B. 3n + 10 C. 10 +13 + 16 + ... + (3n + 10) D. 13 + 16 + 19 + ... + (3n + 10)

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Mathematics

Find the GCF for the group of monomials.x2 and x7

A. x9 B. x2 C. x14 D. x5

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Mathematics

Solve using the substitution method. Use a graphing calculator to check your answer. x + 5y = 185x + 25y = 90

A. (0, 0) B. (5, 5) C. No solution D. Infinitely many solutions

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Mathematics