Which expression is equivalent to 1/2 (6x + 1/2)

Is the power produced directly proportional to the wind speed, give reasons for your answer?

What is the area of the shaded sector?

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: