Evaluate the expression.-10 + (-21)
A. -31
B. -11
C. 31
D. 11
Answer: A
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?Find the surface area of an equilateral-triangular base pyramid is the following dimensions: Length of Side of Base: 11'', Height of Triangular Base: 10'', Slant Height: 17''.
A. ?335.5 inches squared B. 148.5? inches squared C. 148.5 ?inches cubed D. ?335.5 inches cubed E. 1,870 ?inches squared
At what points is the given function continuous?f(x, y) = 
A. All (x, y) B. All (x, y) such that x ? y C. All (x, y) such that x ? - y D. All (x, y) ? (0, 0)
Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.8w + 8x - 6y - 3z = 147w + 6x - 9y - 3z = -78w - 8x + 7y + 4z = -28-6w - 3x + 8y + 8z = 7
A. (-1, 5, 4, -2) B. (1, 5, 4, 2) C. (-1, 4, -5, 2) D. No solution
Write the decimal as a fraction or mixed number in lowest terms.0.0006
A. 
B. 
C. 
D. 