Expample write 0.81 in simplest form. the answer to 0.81 is 9/11 i need with these three

1. 0.5
2. 0.63
3. 0.214

S-7< 3 i need answering this problem someone asap answer

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =