Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form. x- y+ 2z= -14x+ z= 0 x+ 4y+ z= 4
A. (0, 1, -1)
B. No solution
C. (0, 0, 1)
D. (0, 1, 0)
Answer: D
Mathematics
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Solve the problem.A rectangular coal bin has a length of 
feet and a width of 
feet. What is its perimeter?
A. 6
ft
B. 6
ft
C. 12
ft
D. 12
ft
Mathematics
Factor completely.-30x3 - 2x2 + 12x
A. -2x(5x - 3)(3x + 2) B. x(5x - 3)(-6x - 4) C. x(-10x + 6)(3x + 2) D. -2(5x2 - 3)(3x + 2)
Mathematics
Solve the problem.A square has an area of 49 square inches. If the same amount is added to the length and removed from the width, the resulting rectangle has an area of 45 square inches. Find the dimensions of the rectangle.
A. 5 in. by 10 in. B. 5 in. by 9 in. C. 3 in. by 4 in. D. 4 in. by 9 in.
Mathematics
Convert the units using unit fractions.360 sec = 
min
A. 11 B. 15 C. 3 D. 6
Mathematics