Apply the power of a power property to simplify the expression {y^4/3 x y^2/3}^-1/2=(y^2)^-1/2=?

The total number of dental clinics total for the last 12 months was recorded

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.

16x^2-16x=5 solve the equation by completing the square