Using the quadratic formula, which of the following is the solution to the quadratic equation x2 + 2x - 3 = 0? x = -1, -3 x = 1, -3 x = -1, 3 x = 1, 3

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x

During each minute of a comedy show, carlin laughs 55 times. carlin watches 33 comedy shows every day, and each show is 40 minutes long. how many times does carlin laugh every day due to the comedy shows?