Evaluate the permutation.Determine the number of permutations of 9 things taken 2 at a time.
A. 1
B. 9
C. 72
D. 504
Answer: C
Mathematics
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Solve by completing the square.a2 - 10a - 24 = 0
A. 12, -2
B. -22, -2
C. 
, -
D. -12, 2
Mathematics
Add and subtract as indicated. Simplify and leave the numerator and denominator in your answer in factored form.
+ 
- 
A. 
B. 
C. - 
D. 
Mathematics
Use Gauss-Jordan elimination to solve the linear system and determine whether the system has a unique solution, no solution, or infinitely many solutions. If the system has infinitely many solutions, describe the solution as an ordered triple involving variable z.x + 8y + 8z=87x + 7y + z=18x + 15y + 9z=-9
A. (-1, 0, 1) B. (0, 0, 1) C. (1, -1, 1) D. no solution
Mathematics
Solve the problem.What is the perimeter of a rectangle of length 15 ft and width 13 ft?
A. 43 ft B. 28 ft C. 112 ft D. 56 ft
Mathematics