Simplify each expression. 1. (p^4q^2)(p^7q^5) 2. 3f^3g^0 3. (4h^5k^3)(15k^2h^3) 4. (-5a^2b)() 5. 4x(2x^2y)^0 6. (3x^4y)(2y^2)^3

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.