Can you please tell me what is 7+(-2)=?

Factor the monomial completely 42a3b3

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6

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