Someone help and plz make sure it’s right will mark brainiest

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

What is the order of these fractions from least to greatest 2/3 7/10 5/8 65/100

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30