Factor the polynomial by removing any common monomial factor.7x4 - 21x2
A. 7x2(x2 - 21)
B. 21x2(x2 - 1)
C. 7(x4 - 3x)
D. 7x2(x2 - 3)
Answer: D
Mathematics
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Evaluate the integral using the given substitution.
dx , u = x5 - 3
A. 
(x5 - 3)5 + C
B. 
x25 - 3 + C
C. 
(x5 - 3)3 + C
D. 
(x5 - 3)5 + C
Mathematics
Solve the problem.The solid lies between planes perpendicular to the x-axis at x = -2 and x = 2. The cross sections perpendicular to the x-axis are circles whose diameters stretch from the curve 
to the curve 
Find the volume of the solid.
A. 49?
B. 49?2
C. 
?2
D. 
?2
Mathematics
Find the monthly mortgage payment.
A. $431.82 B. $600.76 C. $501.92 D. $512.43
Mathematics
Factor completely. If the polynomial is prime, state so.9x2y2 - 60xy + 100
A. (3xy + 10)2 B. (3xy - 10)2 C. (3xy + 10)(3xy - 10) D. prime
Mathematics