Solve the system of equations.4x + y - 2z + w = -1-x + 4y + z - 4w = 35x - y + 4z + 2w = 9 x + y - 4z - w = -1
A. (2, -6, 0, 4)
B. (-3, 1, 2, 1)
C. (2, -3, 1, -4)
D. (-2, -1, 2, 4)
Answer: C
Mathematics
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Find the square root, rounded to hundredths if necessary.
A. 24 B. 25 C. 23 D. 46
Mathematics
Use a graphing calculator to estimate the solution set of the equation. Round to the nearest hundredth.
x = 12
A. {-4.00} B. {-0.44} C. {2.26} D. {-2.26}
Mathematics
Solve the problem.Glenn and Paula want to dig an irrigation channel for their garden. Together it takes them 
to dig an appropriately sized irrigation channel. If Paula can dig the channel by herself in 
how long would it take Glenn to dig the channel by himself? Round to the nearest tenth, if necessary.
A. 1 hr B. 2.3 hr C. 4 hr D. 3.8 hr
Mathematics
Rationalize the denominator.
A. 
B. 
C. 
D. 
Mathematics