the diagram below show the test scores of two classes of students: Q1. how many students took the test altogether Q2. what is the median score of class B Q3. what was the modal score of class A Q4. what was the range of scores in class B please can you answer

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

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.

Why is x= 4 a solution to the proportion 14/x 56/1 6