Find the mean absolute deviation for all of them plz will mark brainiest and will give 40 points later

Which conjunction is disjunction is equivalent to the given absolute value inequality? |x+2|< 18

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *