13. SHOPPING You go to the hardware store for some building materials. You purchase 7 fans (f) for a house you are remodeling and $8 worth of other materials. You return 2
fans (f) that were not working properly. Write an expression that represents your
shopping. After writing your expression, simplify the expression.

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.

Luke wants to reduce the area of his rectangular garden by 1/4 the expression 14/w can be used to represent this change. what is another way to write this expression?

The table showed price paid per concert ticket on a popular online auction site. what was the average price paid per ticket