Solve the system of equations.2x + 8y + 4z = 30x + 4y + 2z = 10x + y + z = -3
A. {(-3, 4, -1)}
B. {(-3, -1, 4)}
C. ?
D. {(-1, 4, -3)}
Answer: C
Mathematics
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Find curl F.F(x, y, z) = ei + ln(2y + z)j + xyezk
A. 
i - yezj + 0k
B. 
i + yezj + 1k
C. 
i - yezj + 1k
D. 
i -yezj + 0k
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There are 10 nodes on a computer network. Each node connection should be of equal length. The actual measurements are shown below in feet. Find the mean length. 52, 50, 52, 51, 50, 51, 48, 49, 49, 50
a. 50.8 b. 51 c. 50.2 d. 49.9
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Find the principal. Round to the nearest cent.Rate: 4.2%Time: 300 daysInterest: $19.01
A. $54.31 B. $543.14 C. $593.14 D. $1,901.00
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The graph of y = ax2 + bx + c is given in the figure. Solve the equation 
A. x = 6 B. x = -6 C. x = 0 or -6 D. x = 0
Mathematics