In desperate need. for answer 11 and 12. Question 11 has to have an answer with explanation and
Question 12 has 3 parts. I need answers to all three with explanations for all three.

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?

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

Proportions in triangles solve for x