To divide x3y by x4y, first divide y by y to get x3/x4. Which of these would you do next to solve? Question 20 options:

x(3 – 4)

x(3 ÷ 4)

x(4 ⋅ 3)

x(4 – 3)

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?