For the given Cartesian equation, write an equivalent polar equation.x2 + y2 - 4x = 0
A. r cos2 ? = 4 sin ?
B. r = 4 sin ?
C. r sin2 ? = 4 cos ?
D. r = 4 cos ?
Answer: D
Mathematics
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Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = csc(cot x)
A. y = csc u; u = cot x; 
= csc(cot x) cot(cot x) csc2 x
B. y = cot u; u = csc x; 
= csc2(csc x) csc x cot x
C. y = csc u; u = cot x; 
= csc3 x cot x
D. y = csc u; u = cot x; 
= - csc(cot x) cot(cot x)
Mathematics
Use the Lucas sequence to answer the question.What is the 26th term of the Lucas sequence?
A. 271,443 B. 167,761 C. 165,061 D. 103,682
Mathematics
Find the product.-2(6x - 7)
A. 2x B. -12x - 7 C. 6x + 14 D. -12x + 14
Mathematics
Round the number as indicated.127 to the nearest hundred
A. 110 B. 0 C. 200 D. 100
Mathematics