1. Two of the angles of a triangle measure 20° and 140°. Classify the triangle. A. Scalene
B. Isosceles
C. Equilateral

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”?

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove

How can you check that you have correctly converted frequencies to relative frequencies?