An expression equivalent to -4(2k-6)

What is the vertex form of f(x) = x2 + 6x + 3

On a architect's drawing of a house, 1 inche representa 1.5

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)