How did the Constitution ensure the United States government remained a representative government?

The Constitution strengthened the national government by giving the national government specific powers. With the Constitution, Congress now had the power to tax and to regulate interstate commerce. ... The Constitution also created the executive and judicial branches of government.

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

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”