1/2 (y+4)=(x-7)^2 how to find the vertex?

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

X+ y = 5 ; x - y =3 solve using linear combination