Given matrix A, find the indicated minor.Find M42.A = 
A. -35
B. 0
C. -70
D. 70
Answer: C
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Solve the problem.The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose the the intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 12 miles? Round your answer to the nearest unit.
A. 205 units B. 186 units C. 222 units D. 248 units
A bullet is fired into the air with an initial velocity of 1,400 feet per second at an angle of 
from the horizontal. Find the horizontal and vertical vector components of the velocity.
?
A. ?
ft/sec, 
ft/sec
B. ?
ft/sec, 
ft/sec
C. 
ft/sec, 
ft/sec
D. ?
ft/sec, 
ft/sec
E. ?
ft/sec, 
ft/sec
Write the matrix equation as a system of linear equations without matrices.
= 
A. -7x1 + x2 + x3 = -8 x1 - 5x2 = 8 B. -7x1 = -8 x1 + x2 = 8 -8x1 - 5x2 = -7 C. -7x1 + x2 = -8 x1 + 8x2 = 8 -8x1 - 5x2 = -7
Solve the system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
?
A. x = 1, y = -3, z = 0, w = 3; (1, -3, 0, 3) B. x = 1, y = 3, z = 0, w = -3; (1, 3, 0, -3) C. x = -1, y = 3, z = 0, w = -3; (-1, 3, 0, -3) D. x = -1, y = -3, z = 0, w = 3; (-1, -3, 0, 3)