50 POINTS! + Brainliest Hannah is at the supermarket to buy carrots and potatoes. If she buys 2 pounds of carrots and 3 pounds o
f potatoes, it will cost her a total of $8, and if she buys 4 pounds of carrots and 4 pounds of potatoes, it will cost her a total of $13. Which of these statements is correct?/ Carrots cost $1.50 a pound, which is less than potatoes cost.
Carrots cost $1.75 a pound, which is more than potatoes cost.
Carrots cost $1.75 a pound, which is less than potatoes cost.
Carrots cost $1.50 a pound, which is more than potatoes cost.
Let's say that the speed of the freight train is and the one of the passenger train is .
MPH means every hour the freight train covers miles., which means in 3h it will have covered 3 times as much: mi.
Following the same logic, MPH means every hour the passenger train covers miles, meaning after 3h it will have covered 3 times as much as well: mi.
Now, having expressed those distances and speeds algebraically, we find the difference between the two distances covered after 3h, knowing it will be equal to 240:
Knowing this, we can surely affirm that the freight train is travelling at 40MPH and the passenger train is travelling three times as fast, 120MPH.