How could you use a graphing calculator to determine whether you have correctly solved a quadratic equation by completing the square? Select all that apply. A. Compare the maximum or minimum of the graph to the solutions calculated. B. Compare the zeros of the graph to the solutions calculated. C. Compare the vertex of the graph to the vertex found after completing the square which places the equation in vertex form. D. Compare the y-intercept of the graph to the solutions calculated.

What expression is equivalent to (2x-1)(x-3)?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Aschool had an election where the candidates received votes in the ratio 1: 2: 3. if the winning candidate received 210 votes, how many total people voted in the election?