If c= 12, what is the value of a?

What is the 12th term of b(n)=-4-2(n-1)

Use the distributive law to multiply. 3(4x + 5y + 6)

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 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/show your work: