Given: mEDF = 120°; mADB = (3x)°; mBDC = (2x)° Prove: x = 24


What is the missing reason in step 3?


vertical angles are congruent

substitution

definition of congruency

definition of equality

What two consecutive odd integers have a sum of -28

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.