Which of the following are characteristics of an economic
union?

common trade regulations

absence of national governments

free movement of capital and labor

prohibition on all external trade

free movement of goods

! more then one answer!

The correct answers are:

- common trade regulations;

- free movement of capital and labor;

- free movement of goods;

The economic unions are made with the purpose of enabling two or more countries to be able to trade between each other with ease and without restrictions and problems. The labor force to be able to move freely in each of them, if there's need for it of course, as well as the free movement of capital, and free movement of goods. These things are all made in a way that they will be well suited for each member of the economic union, and that it will enable the economy of each member to improve.

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69