The temperature in a greenhouse should be 66 degrees or higher. One​ morning, the heater stopped working. The temperature dropped 4 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?

is should be y = 5x

step-by-step explanation:

correct me if im wrong

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.