Write the rational expression in lowest terms.
A. a + n
B. -a + n
C. -a - n
D. -1
Answer: C
Mathematics
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Express the sum in sigma notation.3 + 6 + 9 + 12 + 15
A. 
B. 
C. 
D. 
Mathematics
Find d2y/dx2 without eliminating the parameter.x = cot t - 3, y = 11 csc t - 2, 0 < t < ?
A. 
B. 11 sin t cos2t
C. 11 sin3t
D. 
Mathematics
Find the derivative.s = t5 cos t - 14t sin t - 14 cos t
A. 
= - t5 sin t + 5t4 cos t - 14t cos t - 28 sin t
B. 
= t5 sin t - 5t4 cos t + 14t cos t
C. 
= - t5 sin t + 5t4 cos t - 14t cos t
D. 
= - 5t4 sin t - 14 cos t + 14 sin t
Mathematics
Use scientific notation to perform the following operations. Leave your answer in scientific notation.(4.8 × 1024) ÷ (1.2 × 106)
A. 4 × 1018 B. 4 × 104 C. 4.8 × 1018 D. 4 × 1030
Mathematics