Remove the parentheses and simplify, if possible.(6 + 5n2 - 7n) + (9n2 + 2n + 2)
A. 14n2 - 5n + 8
B. 17n2 - 5n + 8
C. 14n2 - 5n + 2
D. 15n2 + 7n - 5
Answer: A
Mathematics
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Find the derivative.r = 17 - ?8 cos ?
A. 
= 8?7 cos ? - ?8 sin ?
B. 
= 8?7 sin ?
C. 
= 8?7 sin ? - ?8 cos ?
D. 
= - 8?7 cos ? + ?8 sin ?
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Find the length of the curve with the given vector equation.r(t) = (6 + 2t3)i + (2t3 - 5)j + (4 - t3)k, 1 ? t ? 3
A. 252 B. 84 C. 78 D. 234
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. 2 B. 0 C. 1 D. No limit
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Perform the indicated operation
Mathematics