Chose all that apply
in what way(s) did the chinese use steal and iron
to build submarines
to make a chain's for the suspension bridge
to build the great wall
to make agricultural tools

i believe the answer is d.

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

explanation:

damn girl thats not really your friend then. : /

the western roman empire flourished, but the eastern portion of the empire struggled.