Frank purchased 10 gallons of gas for $21.50. What is the constant of proportionality that relates the cost in dollars, y, to the number of gallons, x?

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)

This graph shows which inequality? a ≤ –3 a > –3 a ≥ –3 a < –3

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?