Solve the system of equations using matrices. Use Gauss-Jordan elimination. x + y - z + w = -5 3x - y + 3z - 2w = 7-2x + 2y + z - w =16 -x - 2y - 3z + 3w = -22
A. {(-2, 3, 4, -2)}
B. {(
, - 
, - 
, - 
)}
C. {(2, -3, -4, -2)}
D. {(-2, -3, 5, 
)}
Answer: A
Mathematics
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What fact family is associated with the rectangular array?1117 by 4
A.
| 1117 ? 4 = 4468 | 4468 ÷ 1117 = 4 |
B. 1117 ? 4 = 4 ? 1117
4468 ÷ 1117 = 1117 ÷ 4468
4468 ÷ 4 = 4 ÷ 4468
Mathematics
Solve the compound inequality. Express the solution using interval notation. Graph the solution set.-7x + 1 ? 15 or 5x + 3 ? -17
A. [-4, -2]
B. [-4, ?)
C. [-2, ?)
D. (-?, ?)
Mathematics
Determine the constant term that must be added to the expression to make it a perfect square.x2 - 13x
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.If a projectile is fired at an angle ? and initial velocity v, then the horizontal distance traveled by the projectile is given by 
Express D as a function of 2?.
A. D = 
v2 sin 2?
B. D = 
v2 cos 2?
C. D = 
v2 sin 2?
D. D = 
v2 sin 2?
Mathematics