Solve the system by substitution.
What will be an ideal response?
Mathematics
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Solve the system of linear equations. If the system has infinitely many solutions, describe the solution with an ordered triple in terms of variable z.4x - y + 3z=12x + 4y + 6z=-325x + 3y + 9z=20
A. (2, -7, -1) B. (-8, -7, 9) C. no solution D. (8, -7, -2)
Mathematics
Find the inverse, if it exists, of the given matrix.
A. 
B. 
C. 
D. Does not exist
Mathematics
Use the LCD to clear fractions and solve the given equation.- 
x = - 
- 
A. - 
B. 
C. 
D. - 
Mathematics
Solve the problem.One student is selected at random from a group of 4 freshmen, 5 sophomores, 6 juniors, and 6 seniors.Find the probability that the person selected is a senior.
A. 
B. 
C. 
D. 
Mathematics