The graph shows the number of paintballs, y, a machine launches in x seconds:

which expression can be used to calculate the rate per second at which the machine launches the balls?

fraction 140 over 5
fraction 5 over 140
fraction 35 over 5
fraction 5 over 35

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Which system of linear inequalities is represented by the graph?