Suppose two competing railroad companies agreed to fix shipping rates at a level that benefited both. What is this kind of voluntary arrangement called? A holding company A monopoly A trust A pool

A Pool

Explanation:

Given that a POOL is a form of business strategy where competing business firms come together to form an agreement or union that is based on maximizing profits by reducing competition through controlling prices.

Hence, in this case, where two competing railroad companies agreed to fix shipping rates at a level that benefited both. This kind of voluntary arrangement is called "A POOL."

8 - (2a + 7) = a + 40     distribute/multiply - into (2a + 7)

8 - 2a - 7 = a + 40

1 - 2a = a + 40       add 2a on both sides

1 = 3a + 40         subtract 40 on both sides

-39 = 3a       divide 3 on both sides

-13 = a

[proof]

8 - (2a + 7) = a + 40

8 - (2(-13) + 7) = -13 + 40

8 - (-26 + 7) = 27

8 - (-19) = 27

8 + 19 = 27

27 = 27