Given the quadratic function f(x)=y=x^2+4x+1, do the following. A)Find the coordinates of the vertex
B)Find the x-intercepts using an algebraic method, write the answer using radicals do not use decimals.
C)Graph the function (using at least three points with integer coordinates).​

Anyone know? will mark brainliest if correct!

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row