Simplify the given expression.-4 ? 32
A. -144
B. 36
C. -36
D. 144
Answer: C
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Show that the function is a solution of the wave equation.w(x, t) = e-7ct cos -7x
A. Yes B. No
Write the system of inequalities that describes the possible solutions to the problem.The Acme Class Ring Company designs and sells two types of rings: the VIP and the SST. The company can produce up to 40 rings each day, using up to 100 total man-hours of labor. It takes 2 man-hours to make one VIP ring and 5 man-hours to make one SST ring. Let x represent the number of VIP rings, and let y represent the number of SST rings. Including the system inequalities 
and 
, find the remaining inequalities that best describe this company's ring production.
A. x + y ? 40, 5x + 2y ? 100 B. x ? 40, y ? 40, 5x + 2y ? 100 C. x + y ? 40, 2x + 5y ? 100 D. x ? 40, y ? 40, 2x + 5y ? 100
Factor the sum or difference of two cubes.x6 - y3
A. (x2 - y)(x4 + x2y + y2) B. (x2 + y)(x4 - x2y - y2) C. (x2 + y)(x4 + x2y + y2) D. (x2 + y)(x4 - x2y + y2)
Find the standard form of the equation of the following conic section.Ellipse with center at the origin, an x-intercept at (-4, 0), and a y-intercept at (0, 6).
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1