Use the formula for an to find the general term for the arithmetic sequence.a1 = 4, d = -4
A. an = -4n + 8
B. an = -4n - 4
C. an = 4n - 4
D. an = 4n + 4
Answer: A
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A. 
cos ? [cos(5?) + cos(7?)]
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C. 
cos ? [cos(5?) - cos(7?)]
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A rectangle length is five times as long as it is wide. Its perimeter is 540 cm. Find the length and the width of the rectangle.
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