Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the solution with y arbitrary.x + y = 3x - y = -4
A. 
B. 
C. ?
D. 
Answer: A
Mathematics
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Suppose the triangles shown are similar with angle A = angle D, angle B = angle E, and angle C = angle F. Answer the question.
What is the length of side DF?
A. 22 B. 54 C. 40 D. 86
Mathematics
Perform the indicated operation and express in lowest terms.
+ 
- 
A. 
B. 
C. 
D. 
Mathematics
Maximize the objective function R, subject to the given constraints.R = 6x + 7y 2x + 3y ? 122x + y ? 8x ? 0, y ? 0
A. R = 24 B. R = 13 C. R = 32 D. R = 52
Mathematics
Find the indicated power of the matrix A.Let A = 
. Find A2.
A. 
B. 
C. 
D. 
Mathematics