The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using back-substitution.
A. {(2, 5)}
B. {(4, -2)}
C. ?
D. {(5, 2)}
Answer: D
You might also like to view...
Write the indicated function.Sue wants to put a rectangular garden on her property using 84 meters of fencing. There is a river that runs through her property so she decides to increase the size of the garden by using the river as one side of the rectangle. (Fencing is then needed only on the other three sides.) Let x represent the length of the side of the rectangle along the river. Express the garden's area as a function of x.
A. A(x) = 43x - 2x2
B. A(x) = 42x - 
x2
C. A(x) = 41x - 
x2
D. A(x) = 42x2 - x
Find an equation for the graph.
A. y = -4 sin (2x)
B. y = -4 cos 
C. y = -4 sin 
D. y = -4 cos (2x)
Round the money amount to the nearest cent or dollar as indicated.$3999.53, nearest dollar
A. $3999.5 B. $3000 C. $4 D. $4000
Factor the expression completely. If the polynomial is prime, state this as your answer.1000x3 + 729y3
A. (10x - 9y)(100x2 + 90xy + 81y2) B. (10x + 9y)(100x2 + 90xy + 81y2) C. (10x + 9y)(100x2 - 90xy + 81y2) D. (1000x - 9y)(x2 + 90xy + 81y2)