What is the equation of the quadratic graph with a focus of (4,-3) and a directrix of y=-6? A. f(x)= -1/6x^2+4/3x+11/6

B. f(x)= -1/6x^2-4/3x-11/6

C. f(x)= 3/50x^2+11/25x+3/5

D. f(x)= 3/50x^2-11/25x-3/5
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The amount of energy it takes to lift a box might be a function of which of the following

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)