Sry the app makes the photo so bad quality but anyways can someone please help me

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

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.