What of the following is true for all parallelograms? (2 points) a
Opposite sides are parallel.

b
All four angles are congruent.

c
All four angles are acute angles.

d
All four sides are equal in length.

Suppose the probability of selling a car today is 0.28. find the odds against selling a car today.

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.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83