A triangle has side lengths of (7a+2b) centimeters, (6a+3c)centimeters, and (3c+4b)centimeters. Which expression represents the perimeter, in centimeters, of the triangle?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

Rewrite so the subject can be y in the formula d=m-y/y+n

50 points and will mark brainlest if you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking: