Need the answer for x and y

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?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab