O 1=1
7) Cross multiply to determine whether the fractions are equivalent.

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.

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.