Express the sum using summation notation.
+ 
+ 
+ ... + 
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Evaluate the expression for the given replacement values.2x - y
for x = 9, y = -3
A. 21 B. 14 C. -4 D. 15
Mathematics
Provide an appropriate response.Solve the inequality: x + 2 < 7 < 2x - 3
A. all real numbers B. no solution C. x = 5 D. x < -5 or x > 5
Mathematics
Solve.Given log 2 = 0.3010 and log 3 = 0.4771, evaluate log12.
A. 0.5677 B. 0.2872 C. 1.0791 D. 1.2552
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. 5x - y + z = 8 7x + y + z = 6
A. (-z + 3, 4z + 7, z)
B. 
C. no solution
D. 
Mathematics