Which letter has rotational symmetry?

A) S
B) U
C) D
D) L

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

In the pendulum formula t=2pi. read the problem on the picture ! ; $; $; ! ; ! ; ! ; )$; ! ; ! ; ! ; $; $; $! ; ! ; ); $; $$

2x + 1 < 5 solve the following inequality. then place the correct number in the box provided.