Which one gives a pair of equivalent numerical expressions that show the Distributive Property? A 6 × (9 + 3) and (6 × 9) + (9 × 3)
B 6 × (9 + 3) and (6 × 9) − (6 × 3)
C 6 × (9 + 3) and (3 × 9) + (6 × 3)
D 6 × (9 + 3) and (6 × 9) + (6 × 3)

Evaluate the equivalent expressions.

The value of the equivalent expressions is
.

Choose the linear inequality that describes the graph. the gray area represents the shaded region. a: y ≤ –4x – 2 b: y > –4x – 2 c: y ≥ –4x – 2 d: y < 4x – 2

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)