The ages and grades of some of the 18 girls on a club soccer team are shown in the table. 15 years old:16 years old 0
9th grade:. 2 0
10th grade: 10

Which two-way correctly shows the marginal frequencies?

Don't know how to find x given these segment lengths

Find the zeros of each function. f(x) = x^2 + 5x - 6

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”?