If you are in 7th grade, and your in the Virtual School House and you use peak/ fueled as your hw or your school work can someone tell me what number the world civ final is? I think it's like 5.15 or something, but if you know, then PLEASE tell me. thanks! :)

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

southern north america: yucatán peninsula in southern mexico extending into northern guatemala, and northern belize. these moist forests on the yucatán peninsula of south-eastern mexico are characterized by a tropical humid climate with little topographic relief.

explanation: