Which early Mesoamerican civilization is considered the "Mother Culture" of Middle America, who created large stone heads approximately 6-9 feet tall, weighing 10-40
tons?

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

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.

c. the king has significantly abused the colonists' rights many times over a long period of time.