The metal in a penny is worth about 0.505 cent. how many cents is this written as a fraction

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Determine the vertex form of g(x) = x2 + 2x - 1. which graph represents g(x)? -nw -3-2-1, 1 1 2 3 -3 2- 1 -3- 1 2 3 - 1 2 3

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4