Solve.
x = 
A. 1/4
B. -1/4
C. 4
D. -4
Answer: D
Mathematics
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Factor by grouping.6x2 - 4x - 9x + 6
A. (2x - 3)(3x - 2) B. (2x + 3)(3x + 2) C. (6x + 3)(x + 2) D. (6x - 3)(x - 2)
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Simplify the expression. Assume that all variables represent nonnegative real numbers.3
- 9
A. -6
B. -6
C. 12
D. -27
Mathematics
Calculate using the rules for order of operations.48 - (-4)2 + 21 ÷ (-3) ? 2Round to two decimal places, if necessary.
A. 50.00 B. 18.00 C. -8.83 D. -14.17
Mathematics
Kirchhoff's Law gives us the derivative equation 
If Q(0)=0, use Euler's method with step size 0.1 to estimate Q after 0.3 second.
Mathematics