Question

At midnight, the temperature in Escondido was 68 degrees. The temperature was

dropping at a steady rate of 2 degrees per hour. How many hours was the temperature
was colder than -4 degrees Celsius.
Write the inequality:

Answer 1

Define the variable: X hours

So, 68-2x < -4 {inequality}

68+4 < 2x {Transposition}

7 2(put 2 onto of 7) < 2x

36 < x

x > 36hours