The cost of petrol rises by 2 cents a liter. last week a man bought 20 liters at the old price. this week he bought 10 liters at the new price. altogether, the petrol costs $9.20. what was the old price for 1 liter?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

What is the measure of angle tvu shown in the diagram below

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.