The axis of symmetry for a quadratic equation can be found using the formula x = , where a and b are coefficients in the quadratic equation and x represents the values along a vertical line on the coordinate plane. when the equation is solved for a, such that b is the numerator of the resulting fraction, what is the denominator of the fraction?

X = -b/2a 
multiply both sides by 2a 
2ax = -b 
divide both sides by 2x: 
a = -b/2x to make a positive b in the numerator, make the denominator negative: 
a = b/-2x 
answer is b.) -2x 

P = mgh 
divide both sides by mg: 
P/mg = h 

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The answer is letter D