Write a matrix equation equivalent to the system of equations. 9x - 2y + 2z = 50 3x + 4y + 2z = 32 7x - 2y + 4z = 40
A. 
=
B.
| ? |
= 
C.
=
D.
= 
Answer: B
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Solve the proportion equation.
= 
A. 0.0588
B. 0.588
C.
| 0.10625? |
D. 2.5
Find the center-radius form of the equation of the circle satisfying the given conditions.Center (12, 19), tangent to the y-axis
A. (x - 19)2 + (y - 12)2 = 12 B. (x - 12)2 + (y - 19)2 = 144 C. (x - 12)2 + (y - 19)2 = 12 D. (x - 19)2 + (y - 12)2 = 144
Solve the problem.Two hikers on opposite sides of a canyon each stand precisely 525 meters above the canyon floor. They each sight a landmark on the canyon floor on a line directly between them. The angles of depression from each hiker to the landmark meter are 37° and 21°. How far apart are the hikers? Round your answer to the nearest whole meter.
A.
| 2063 m |
B. 2065 m
C. 1064 m
D. 2064 m
In the statement, fill in the first blank with either solid or dashed. Fill in the second blank with above or below.The boundary of the graph of y ? - 
x - 
will be a 
line, and the shading will be 
the line.
A. solid; below B. solid; above C. dashed; below D. dashed; above