Use Gaussian elimination and matrices to solve the system of linear equations. Write your final augmented matrix in triangular form and then solve for each variable using back substitution. 7x - y + 2z= 63 8x + 2z= 74 4y + z= 25
A. (-7, 14, 4)
B. (7, 4, 9)
C. (-7, 4, 14)
D. (7, 9, 4)
Answer: B
You might also like to view...
Show that the equation is not an identity by listing the value(s) of the variable from among 0, 
, 
, and - 
for which the equation is false.(sin ? + cos ?)2 = 1
A. 0 and 
B. - 
C. 
and - 
D. 
Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = (sin x)cos x
A. cos x cot x - ln (sin x) B. (sin x)cos x(cos x cot x - sin x ln (sin x)) C. cos x ln ( sin x) D. cos x cot x - sin x ln(sin x)
Solve the problem.A coin has a circumference of 68.14 mm. Find its radius and area. Round the radius and area to the nearest hundredth. (Use 3.14 to approximate 
A. 213.94 mm; 3644.57 mm2 B. 21.7 mm; 1478.59 mm2 C. 10.85 mm; 369.65 mm2 D. 10.85 mm; 1160.70 mm2
Simplify the trigonometric expression by following the indicated direction.Multiply 
by 
Fill in the blank(s) with the appropriate word(s).