Evaluate the determinant.
A. - 45
B. 45
C. -27
D. 0
Answer: B
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Write the sentence as an equation. Let the variable x represent the number.The product of 6 and a number, increased by 3, is 21.
A. 6x - 3 = 21 B. 6x + 3 = 21 C. 18x = 21 D. 6(x + 3) = 21
The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using backward substitution.
Write the solution as an ordered triple, if possible.
A. (-5, 1, 2) B. (2, -7, -17) C. No solution D. (17, -7, 2)
Solve. Write results using scientific notation.The following equation gives the number of atoms in 320 g of neon. How many atoms are there? A = 320 g Ne x 
x 
A. 1.88 x 1025 atoms B. 1.89 x 1025 atoms C. 1.92 x 1024 atoms D. 1.97 x 1026 atoms
Complete the factoring.6x2 - 37x - 35 = (x - 7)( )
A. 6x + 5 B. x + 6 C. x - 5 D. 5x + 6