Decide whether or not matrix A and matrix B are inverses.A = 
and B = 
A. Yes
B. No
Answer: A
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Parametric equations and and a parameter interval for the motion of a particle in the xy-plane are given. Identify the particle's path by finding a Cartesian equation for it. Graph the Cartesian equation. Indicate the portion of the graph traced by the particle and the direction of motion.x = 4 cos t, y = 4 sin t, ? ? t ? 2?
A. x2 + y2 = 1
Clockwise from (1, 0) to (1, 0), one rotation
B. x2 + y2 = 16
Counterclockwise from (4, 0) to (4, 0), one rotation
C. x2 + y2 = 16
Counterclockwise from (-4, 0) to (4, 0)
D. x2 + y2 = 16
Clockwise from (4, 0) to (-4, 0)
Factor by grouping.15a3 + 12a2b - 25ab2 - 20b3
A. (3a2 + 5b2)(5a - 4b) B. (3a2 - 5b2)(5a + 4b) C. (15a2 - 5b2)(a + 4b) D. (3a2 - 5b)(5a + 4b)
Find the product.
A. Undefined
B. 
C. 
D. 
Use De Morgan's laws to write the negation of the statement.It is Saturday and it is not raining.
A. It is Saturday and it is raining. B. It is not Saturday or it is not raining. C. It is not Saturday or it is raining. D. It is not Saturday and it is raining.