Add or subtract. Express the answer as a mixed number.14
- 7
A. 21
B. 6
C. 6
D. 20
Answer: C
Mathematics
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Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.-2x + 9y = -13-4x + 18y = -15
A. (2, -1) B. (2, 5) C. (-13, 5) D. No solution
Mathematics
Solve the equation by completing the square.6x2 + 10x = - 1
A. 
B. 
C. 
D. 
Mathematics
Find an expression for the nth term of the arithmetic sequence.- 
, - 
, - 
, - 
, - 
, . . .
A. an = - 
B. an = - 
C. an = - 
D. an = - 
Mathematics
Solve the problem.In how many ways can 2 people each have different birth months?
A. 132 B. 24 C. 66 D. 144
Mathematics