Triangle abc and cde are similar right triangles. which proportion can be used to show that the slope of ac is equal to the slope of ce?

a) ) = )

-1 -4 5-1

b))= 5-1

-) )

c) -)= 5-1

1-1(-1) )

b))= )

-) 5-1

What can each term of the equation be multiplied by to eliminate the fractions before solving? x – + 2x = + x 2 6 10 12

Ineed with number 6 , explain how to get 1978

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.