Question

the temperature in a greenhouse should be 66 degrees or higher. one morning, the heater stopped working. the temperature dropped 5 degrees before someone fixed the heater. the temperature was still at least 66 degrees when the heater started working again. how can you best describe the temperature in the greenhouse before the heater stopped working? the temperature in the greenhouse was at least \\(\square\\) degrees before the heater stopped working.

Explanation:

Step1: Define variable for initial temp

Let $T$ = temperature before heater stopped.

Step2: Set up inequality

After dropping 5°, temp ≥ 66:
$T - 5 \geq 66$

Step3: Solve for initial temperature

Add 5 to both sides:
$T \geq 66 + 5$
$T \geq 71$

Answer:

71